feat: add GitHub Actions environment for npm publishing

- Configure workflow to use 'npm-publish' environment
- Enhances security by restricting publishes to approved workflow runs
- Allows for environment protection rules (reviewers, branch restrictions)
- Provides better audit trail for package releases

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: amannirala13

.github/workflows/publish.yml

@@ -18,6 +18,7 @@ on:
 jobs:
   publish:
     runs-on: ubuntu-latest
+    environment: npm-publish
     permissions:
       contents: read
       packages: write