Move some content out of deprecated /guides directories (#5769)

Contributes to #5767 and
#4565 by moving a few
isolated pages within the `/guides` directory that have an existing
suitable location to there.

These are grouped as an initial step as they don't require larger
content or restructuring changes, unlike some other pages within the
`/guides` directory.

| Original location | New location |
|--------|--------|
| `/guides/libraries/useful-libraries` | `/resources/useful-packages` |
| `/guides/libraries/writing-package-pages` |
`/tools/pub/writing-package-pages` |
| `/guides/google-apis` | `/resources/google-apis` |
| `/guides/language/coming-from/**` | `/resources/coming-from/**` |

Author: parlough

firebase.json

@@ -194,8 +194,11 @@
 
       { "source": "/googleapis", "destination": "https://github.com/dart-lang/googleapis", "type": 301 },
       { "source": "/guides/get-started", "destination": "/overview", "type": 301 },
+      { "source": "/guides/google-apis", "destination": "/resources/google-apis", "type": 301 },
       { "source": "/guides/language/analysis-options", "destination": "/tools/analysis", "type": 301 },
       { "source": "/guides/language/cheatsheet", "destination": "/language", "type": 301 },
+      { "source": "/guides/language/coming-from/js-to-dart", "destination": "/resources/coming-from/js-to-dart", "type": 301 },
+      { "source": "/guides/language/coming-from/swift-to-dart", "destination": "/resources/coming-from/swift-to-dart", "type": 301 },
       { "source": "/guides/language/common-prob", "destination": "/guides/language/sound-problems", "type": 301 },
       { "source": "/guides/language/concurrency", "destination": "/language/concurrency", "type": 301 },
       { "source": "/guides/language/effective-dart", "destination": "/effective-dart", "type": 301 },
@@ -212,7 +215,9 @@
       { "source": "/guides/libraries/futures-error-handling", "destination": "/libraries/async/futures-error-handling", "type": 301 },
       { "source": "/guides/libraries/java-interop", "destination": "/interop/java-interop", "type": 301 },
       { "source": "/guides/libraries/objective-c-interop", "destination": "/interop/objective-c-interop", "type": 301 },
-      { "source": "/guides/libraries/c-interop", "destination": "/interop/c-interop", "type": 301 },      
+      { "source": "/guides/libraries/c-interop", "destination": "/interop/c-interop", "type": 301 },
+      { "source": "/guides/libraries/writing-package-pages", "destination": "/tools/pub/writing-package-pages", "type": 301 },
+      { "source": "/guides/libraries/useful-libraries", "destination": "/resources/useful-packages", "type": 301 },
       { "source": "/guides/platforms", "destination": "/overview#platform", "type": 301 },
       { "source": "/install", "destination": "/get-dart", "type": 301 },
       { "source": "/install/**", "destination": "/get-dart", "type": 301 },

src/_data/side-nav.yml

@@ -167,13 +167,13 @@
     - title: How to use packages
       permalink: /guides/packages
     - title: Commonly used packages
-      permalink: /guides/libraries/useful-libraries
+      permalink: /resources/useful-packages
     - title: Creating packages
       permalink: /guides/libraries/create-packages
     - title: Publishing packages
       permalink: /tools/pub/publishing
     - title: Writing package pages
-      permalink: /guides/libraries/writing-package-pages
+      permalink: /tools/pub/writing-package-pages
     - title: Package reference
       expanded: false
       children:
@@ -206,7 +206,7 @@
     - title: Number representation
       permalink: /guides/language/numbers
     - title: Google APIs
-      permalink: /guides/google-apis
+      permalink: /resources/google-apis
     - title: Multi-platform apps
       permalink: /multiplatform-apps
     - title: Command-line & server apps
@@ -365,9 +365,9 @@
       expanded: false
       children:
         - title: JavaScript to Dart
-          permalink: /guides/language/coming-from/js-to-dart
+          permalink: /resources/coming-from/js-to-dart
         - title: Swift to Dart
-          permalink: /guides/language/coming-from/swift-to-dart
+          permalink: /resources/coming-from/swift-to-dart
     - divider
     - title: FAQ
       permalink: /resources/faq

src/content/guides/whats-new.md

@@ -367,7 +367,7 @@ we made the following changes to this site:
 [community resources section]: /community#additional-community-resources
 [migration guide]: /null-safety/migration-guide
 [unsound null safety]: /null-safety/unsound-null-safety
-[Learning Dart as a Swift developer]: /guides/language/coming-from/swift-to-dart
+[Learning Dart as a Swift developer]: /resources/coming-from/swift-to-dart
 [booleans and equality operators]: /effective-dart/usage#dont-use-true-or-false-in-equality-operations
 [content-hashing]: /tools/pub/glossary#content-hashes
 [Zones]: /articles/archive/zones
@@ -381,7 +381,7 @@ we made the following changes to this site:
 [discussion]: /language/functions#parameters
 [Concurrency in Dart]: /language/concurrency
 [`pub global` page]: /tools/pub/cmd/pub-global
-[Learning Dart as a JavaScript developer]: /guides/language/coming-from/js-to-dart
+[Learning Dart as a JavaScript developer]: /resources/coming-from/js-to-dart
 [`dart run` page]: /tools/dart-run#debugging
 [operator precedence and associativity]: /language/operators
 [Building URIs]: /libraries/dart-core#building-uris
@@ -525,7 +525,7 @@ we made the following changes to this site:
   * Updated the [security][] page to match our current security practices.
   * Added a key binding (`/`) to automatically focus the search bar.
 
-[Learning Dart as a JavaScript developer]: /guides/language/coming-from/js-to-dart
+[Learning Dart as a JavaScript developer]: /resources/coming-from/js-to-dart
 
 [Named parameters]: /language/functions#named-parameters
 [Enumerated types]: /language/enums
@@ -716,7 +716,7 @@ we made the following changes to this site:
 [dart-tool]: /tools/dart-tool
 [recommended linter rules]: /tools/analysis#lints
 [core libraries]: /libraries
-[commonly used packages]: /guides/libraries/useful-libraries
+[commonly used packages]: /resources/useful-packages
 [dart.dev/jobs]: /jobs
 [no-promo]: /tools/non-promotion-reasons
 [`dart create`]: /tools/dart-create
@@ -794,9 +794,9 @@ we made the following changes to this site:
 [Numbers in Dart]: /guides/language/numbers
 [streams tutorial]: /tutorials/language/streams
 [typedef section]: /language/typedefs
-[Using Google APIs]: /guides/google-apis
+[Using Google APIs]: /resources/google-apis
 [Using Google Cloud]: /server/google-cloud
-[Writing package pages]: /guides/libraries/writing-package-pages
+[Writing package pages]: /tools/pub/writing-package-pages
 
 
 ### Articles added to the Dart blog {:.no_toc}

src/content/libraries/index.md

@@ -19,7 +19,7 @@ working on collections of objects (`dart:collection`),
 making calculations (`dart:math`), 
 and encoding/decoding data (`dart:convert`). 
 Additional APIs are available in
-[commonly used packages](/guides/libraries/useful-libraries).
+[commonly used packages](/resources/useful-packages).
 
 ## Library tour
 

src/content/overview.md

@@ -171,8 +171,8 @@ publish thousands of packages, with support for features like these:
 
 To see a series of working examples featuring the Dart core libraries,
 read the [core library documentation](/libraries).
-To find additional APIs, see the
-[commonly used packages page](/guides/libraries/useful-libraries).
+To find additional APIs, check out the
+[commonly used packages page](/resources/useful-packages).
 
 
 ## Dart: The platforms {:#platform}

src/content/guides/language/coming-from/js-to-dart.md src/content/resources/coming-from/js-to-dart.md

@@ -1,6 +1,7 @@
 ---
 title: Commonly used packages
-description: Some of the most useful and popular packages, and where you can learn more.
+description: >-
+  Some of the most useful and popular packages, and where you can learn more.
 ---
 
 {% assign pub = site.pub %}

src/content/guides/language/coming-from/swift-to-dart.md src/content/resources/coming-from/swift-to-dart.md

@@ -13,7 +13,7 @@ For information about creating HTTP servers with Dart, see the
 
 For information about other Google APIs (including Firebase)
 that you might want to use from Dart code,
-see the [Google APIs page](/guides/google-apis).
+see the [Google APIs page](/resources/google-apis).
 
 ## Recommended solutions
 

src/content/guides/google-apis.md src/content/resources/google-apis.md

@@ -63,5 +63,5 @@ and [general-purpose packages][] such as `logging`:
 
 {:.table .table-striped .nowrap}
 
-[general-purpose packages]: /guides/libraries/useful-libraries#general-purpose-packages
+[general-purpose packages]: /resources/useful-packages#general-purpose-packages
 [gRPC]: https://grpc.io/

src/content/guides/libraries/useful-libraries.md src/content/resources/useful-packages.md

@@ -122,7 +122,7 @@ is shown—rendered as [Markdown][]—on the page for your package.
 This is the perfect place to introduce people to your code.
 
 For guidance on how to write a great README, see
-[Writing package pages](/guides/libraries/writing-package-pages).
+[Writing package pages](/tools/pub/writing-package-pages).
 
 <a id="changelogmd"></a>
 ## CHANGELOG.md {:#changelog}

src/content/server/google-cloud.md

@@ -82,7 +82,7 @@ The following files affect the contents of your package's web page.
   your package's web page.
   The file's contents should be marked up using [Markdown][].
   To learn how to write a great README, see
-  [Writing package pages](/guides/libraries/writing-package-pages).
+  [Writing package pages](/tools/pub/writing-package-pages).
 
 **`CHANGELOG.md`**
   : If found, this file populates its own tab on your package's web page.

src/content/server/libraries.md

@@ -395,14 +395,14 @@ see these resources:
 
 [README Checklist][]
 : A checklist for writing a README that
-helps readers feel confident about your project.
+  helps readers feel confident about your project.
 
 [Awesome README][]
 : A curated, annotated list of great READMEs.
 
 [Make a README][]
 : An introduction to READMEs,
-with a template and suggestions for a good README.
+  with a template and suggestions for a good README.
 
 [How to write a great README for your GitHub project][]
 : Key elements of a good README, and a template.

src/content/tools/pub/package-layout.md

@@ -35,5 +35,5 @@ Dart resources for writing HTTP servers include:
 [`shelf_router`]: {{site.pub-pkg}}/shelf_router
 [`shelf_static`]: {{site.pub-pkg}}/shelf_static
 [simple-sample]: {{site.repo.dart.org}}/samples/tree/main/server/simple
-[Using Google APIs]: /guides/google-apis
+[Using Google APIs]: /resources/google-apis
 [Using Google Cloud]: /server/google-cloud