Adding release notes for 3.0-alpha1 (#667)

Signed-off-by: Junwei Dai <junweid@amazon.com>
Co-authored-by: Junwei Dai <junweid@amazon.com>

Author: junweid62

.github/workflows/changelog_verifier.yml

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+name: "Changelog Verifier"
+on:
+  push:
+    branches-ignore:
+      - 'whitesource-remediate/**'
+      - 'backport/**'
+  pull_request:
+    branches: main
+    types: [opened, synchronize, reopened, ready_for_review, labeled, unlabeled]
+
+jobs:
+  # Enforces the update of a changelog file on every pull request
+  verify-changelog:
+    if: github.repository == 'opensearch-project/dashboards-flow-framework'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          ref: ${{ github.event.pull_request.head.sha }}
+
+      - uses: dangoslen/changelog-enforcer@v3
+        with:
+          skipLabels: "autocut, skip-changelog"

CHANGELOG.md

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+# CHANGELOG
+All notable changes to this project are documented in this file.
+
+Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.1.0/)
+
+## [Unreleased 3.0](https://github.com/opensearch-project/anomaly-detection/compare/2.x...HEAD)
+### Features
+### Enhancements
+### Bug Fixes
+### Infrastructure
+### Documentation
+### Maintenance
+### Refactoring
+
+## [Unreleased 2.x](https://github.com/opensearch-project/anomaly-detection/compare/2.19...2.x)
+### Features
+### Enhancements
+### Bug Fixes
+### Infrastructure
+### Documentation
+### Maintenance
+### Refactoring

release-notes/opensearch-flow-framework-dashboards.release-notes-3.0.0.0-alpha1.md

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+## Version 3.0.0.0-alpha1 Release Notes
+
+Compatible with OpenSearch 3.0.0.0-alpha1
+### Features
+- Add fine-grained error handling ([#598](https://github.com/opensearch-project/dashboards-flow-framework/pull/598))
+- Change ingestion input to JSON lines format ([#639](https://github.com/opensearch-project/dashboards-flow-framework/pull/639))
+
+### Enhancements
+- Integrate legacy presets with quick-configure fields ([#602](https://github.com/opensearch-project/dashboards-flow-framework/pull/602))
+- Simplify RAG presets, add bulk API details ([#610](https://github.com/opensearch-project/dashboards-flow-framework/pull/610))
+- Improve RAG preset experience ([#617](https://github.com/opensearch-project/dashboards-flow-framework/pull/617))
+- Update model options and callout ([#622](https://github.com/opensearch-project/dashboards-flow-framework/pull/622))
+- Added popover to display links to suggested models ([#625](https://github.com/opensearch-project/dashboards-flow-framework/pull/625))
+- Implicitly update input maps defined on non-expanded queries (common cases) ([#632](https://github.com/opensearch-project/dashboards-flow-framework/pull/632))
+- Show interim JSON provision flow even if provisioned ([#633](https://github.com/opensearch-project/dashboards-flow-framework/pull/633))
+- Add functional buttons in form headers, fix query parse bug ([#649](https://github.com/opensearch-project/dashboards-flow-framework/pull/649))
+- Block simulate API calls if datasource version is missing ([#657](https://github.com/opensearch-project/dashboards-flow-framework/pull/657))
+- Update default queries, update quick config fields, misc updates ([#660](https://github.com/opensearch-project/dashboards-flow-framework/pull/660))
+- Update visible plugin name to 'AI Search Flows' ([#662](https://github.com/opensearch-project/dashboards-flow-framework/pull/662))
+- Update plugin name and rearrange Try AI Search Flows card ([#664](https://github.com/opensearch-project/dashboards-flow-framework/pull/664))
+
+### Bug Fixes
+- Fix error that local cluster cannot get version ([#606](https://github.com/opensearch-project/dashboards-flow-framework/pull/606))
+- UX fit-n-finish updates XI ([#613](https://github.com/opensearch-project/dashboards-flow-framework/pull/613))
+- UX fit-n-finish updates XII ([#618](https://github.com/opensearch-project/dashboards-flow-framework/pull/618))
+- Bug fixes XIII ([#630](https://github.com/opensearch-project/dashboards-flow-framework/pull/630))
+- Various bug fixes & improvements ([#644](https://github.com/opensearch-project/dashboards-flow-framework/pull/644))
+- Fixed bug related to Search Index in Local Cluster scenario ([#654](https://github.com/opensearch-project/dashboards-flow-framework/pull/654))
+
+### Maintenance
+- Support 2.17 BWC with latest backend integrations ([#612](https://github.com/opensearch-project/dashboards-flow-framework/pull/612))
+
+### Refactoring
+- Refactor quick configure components, improve processor error handling ([#604](https://github.com/opensearch-project/dashboards-flow-framework/pull/604))
+- Hide search query section when version is less than 2.19 ([#605](https://github.com/opensearch-project/dashboards-flow-framework/pull/605))