Automate GitHub Releases on version tag push

[adeelraza]

Makes npm run release also create the GitHub Release, so npm and GitHub Releases stay in sync automatically. Publishing stays local (your 2FA); CI only handles the GitHub Release.

Flow

Running npm run release locally (on master, after the version-bump PR is merged):

1. npm run build
2. npm publish — local, with your 2FA (unchanged)
3. npm run release:tag — git tag vX.Y.Z && git push origin vX.Y.Z

Pushing the vX.Y.Z tag triggers the new .github/workflows/release.yml, which:

• extracts the ## X.Y.Z (...) section from CHANGELOG.md,
• runs gh release create vX.Y.Z with those notes (via the built-in GITHUB_TOKEN),
• marks the release as a prerelease if the tag contains a hyphen (e.g. v1.7.0-beta.0),
• falls back to a CHANGELOG link if no matching section exists.

So going forward there's still one command — the GitHub Release appears on its own once the tag lands.

Changes

• package.json: release now appends npm run release:tag; new release:tag script.
• .github/workflows/release.yml: new, on: push: tags: ['v*'], permissions: contents: write.

Validated locally

• npm_package_version resolves in the script env → git tag v2.1.2 && git push origin v2.1.2.
• CHANGELOG extraction verified for a single-section version (2.1.2) and a multi-section one (2.1.0 → Added + Changed, stopping before 2.0.0).
• Prettier clean.

Notes

• Publish order is publish-then-tag, so a failed/cancelled npm publish won't leave a dangling tag.
• Existing tags (v2.0.0, v2.1.2) are untouched; automation applies to the next release (2.1.3+).
• Not included: moving npm publish into CI via an OIDC Trusted Publisher (would make it fully hands-off but needs registering the publisher on npmjs.com). Easy follow-up if you want it later.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.25%. Comparing base (0155e26) to head (4b36005).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #515   +/-   ##
=======================================
  Coverage   96.25%   96.25%           
=======================================
  Files           2        2           
  Lines          80       80           
  Branches       20       20           
=======================================
  Hits           77       77           
  Partials        3        3           

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