build: add npm run bump; parallel npm-publish approval (#568)

* ci: automate release process with workflow-driven version bumps and PR flow

Adds a Release workflow that bumps all package versions, generates release
notes, and opens a PR. Merging the PR auto-tags and creates the GitHub
Release, which triggers npm-publish. Also adds `npm run bump` for local use
and a release.yml config for categorized auto-generated notes.

* ci: simplify release workflow and flatten npm-publish approval chain

- Drop auto-generated RELEASES.md prepending (notes are written manually in PR)
- Flatten npm-publish job dependencies so all publish jobs wait for approval
  together instead of sequentially, reducing 3 approval clicks to 1
- Remove Release environment from publish-mcpb (only needs GH_TOKEN)
- Use --generate-notes for GitHub Release creation

* fix: address review findings in release automation

- release.yml: use RELEASE_TOKEN PAT for gh release create so the
  release:published event triggers npm-publish (GITHUB_TOKEN events
  don't cascade to other workflows)
- release.yml: checkout merge_commit_sha in tag job instead of ref:main
  to avoid tagging later commits
- release.yml: checkout ref:main in prepare job so dispatching from a
  feature branch doesn't pollute the release PR
- release.yml: constrain preid to type:choice[beta] to match
  npm-publish.yml's tag detection
- release.yml: drop -f on push so re-runs fail loudly instead of
  clobbering manual RELEASES.md edits; drop pr-edit fallback
- release.yml: ensure release label exists before gh pr create
- release.yml: make tag push idempotent for re-runs after partial
  failure
- bump-version.mjs: update workspace dependency ranges so major bumps
  don't leave examples pointing at the old major
- bump-version.mjs: run npm install --package-lock-only so npm ci
  on the release PR doesn't fail on lockfile mismatch
- npm-publish.yml: add npm-tag detection to publish-examples so beta
  example releases don't overwrite latest
- .github/release.yml: use [bot] suffix in author excludes so
  dependabot PRs are actually filtered from release notes
- CONTRIBUTING.md: document RELEASE_TOKEN setup; fix npm run -- syntax

* style: auto-fix prettier formatting

* build: add npm run bump; parallel npm-publish approval

- scripts/bump-version.mjs (+ npm run bump): bumps root and all workspace
  package versions, updates examples' ^X.Y.0 dependency range on the root
  package (matters on major bumps), and refreshes package-lock so npm ci
  accepts the release PR.
- npm-publish.yml: all publish jobs now depend directly on [build, test]
  instead of chaining, so they enter "waiting for approval" together and a
  single Review-deployments click approves the lot. Prerelease versions
  (any X.Y.Z-…) publish under --tag beta so they don't take latest.
- CONTRIBUTING.md: release steps now use npm run bump.

Dropped from the original change: the workflow_dispatch release.yml
(required a long-lived PAT to cascade events), label-based
.github/release.yml auto-notes (PRs aren't labeled today), and the
release-X.Y npm-tag for non-main branches (no backport branches yet).

---------

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

package.json

@@ -71,6 +71,7 @@
     "prettier": "prettier -u \"**/*.{js,jsx,ts,tsx,mjs,json,md,yml,yaml}\" --check",
     "prettier:fix": "prettier -u \"**/*.{js,jsx,ts,tsx,mjs,json,md,yml,yaml}\" --write",
     "check:versions": "node scripts/check-versions.mjs",
+    "bump": "node scripts/bump-version.mjs",
     "update-lock:docker": "rm -rf node_modules package-lock.json examples/*/node_modules && docker run --rm --platform linux/amd64 -v $(pwd):/work -w /work -e HOME=/tmp node:latest npm i --registry=https://registry.npmjs.org/ --ignore-scripts && rm -rf node_modules examples/*/node_modules && npm i --registry=https://registry.npmjs.org/"
   },
   "author": "Olivier Chafik",