Add Github CI workflows

[yosriady]

Note

Introduces automated CI and release pipelines via GitHub Actions.

• CI (.github/workflows/ci.yml): On PRs to main, runs Node 22.14.0, installs deps with npm ci, builds (npm run build), and runs tests in a separate job dependent on build.
• Release (.github/workflows/release.yml): On v* tags, verifies tag is on main and matches package.json version, installs/builds/tests, generates release notes from commits (grouped by features/fixes), publishes to npm with provenance, and creates a GitHub Release with notes.

^{Written by Cursor Bugbot for commit 4604ff8. This will update automatically on new commits. Configure here.}