docs(ci): complete bun/turborepo/changesets migration docs and workflows

- Update all CI workflows (pre-commit, tech-debt) to use Bun
- Update build scripts (js_build.sh, cypress_build.sh, eslint.sh) for Bun
- Add sync-package-versions.js script for release version alignment
- Simplify package.json scripts (build:packages, publish:packages)
- Add gitTag: false to changesets config to avoid repo tag clutter
- Remove obsolete Lerna scripts (build.js, lernaVersion.sh)
- Update RELEASING/README.md with comprehensive npm publishing guide
- Update all developer documentation for Bun usage
- Update LLM instruction files (AGENTS.md, dev-standard.mdc)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.github/workflows/pre-commit.yml

@@ -38,15 +38,15 @@ jobs:
           echo "HOMEBREW_CELLAR=$HOMEBREW_CELLAR" >>"${GITHUB_ENV}"
           echo "HOMEBREW_REPOSITORY=$HOMEBREW_REPOSITORY" >>"${GITHUB_ENV}"
           brew install norwoodj/tap/helm-docs
-      - name: Setup Node.js
-        uses: actions/setup-node@v6
+      - name: Install Bun
+        uses: oven-sh/setup-bun@v2
         with:
-          node-version: '20'
+          bun-version: latest
 
       - name: Install Frontend Dependencies
         run: |
           cd superset-frontend
-          npm ci
+          bun install --frozen-lockfile
 
       - name: Install Docs Dependencies
         run: |