feat(dist): publish package to npm registry

[usernane]

Problem

Library only available via CDN, not npm install.

Suggestion

1. Publish to npm: npm publish
2. Add to README: npm install ajaxrequest-helper
3. Set up CI/CD for automated publishing on release

Benefits

• Easier integration in Node.js/bundler workflows
• Version management via package.json
• Wider discoverability