chore: move to a single-pull-request release process (storacha#544)

The release process for this library is currently extremely cumbersome,
requiring as many as 13 different release PRs merged in dependency order
(with no CI-level enforcement and broken packages very possible) and a
very slow build process. Even with relatively minor changes that affect
half the packages I've spent an entire day half-distracted by running
this process in the background.

This PR makes it so that all updated packages will be released at the
same time. This is effectively what we do now, and there's very little
downside to doing this (except perhaps a bit of extra churn on version
numbers on packages that didn't strictly need to be released, but
arguably we should be releasing any package number bumps immediately for
good repo hygiene).

Open to not doing this, but opening to at the very least start the
conversation.

Co-authored-by: Petra Jaros <peeja@peeja.com>

packages/w3ui/release-please-config.json

@@ -1,5 +1,5 @@
 {
-  "separate-pull-requests": true,
+  "separate-pull-requests": false,
   "packages": {
     "packages/core": {},
     "packages/react": {}