chore: prepare for Hacker News launch

- Add MIT LICENSE file
- Fix YOUR_ORG placeholders in README and DEPLOYMENT docs
- Fix Node.js version mismatch in release workflow (21 → 22)
- Delete 17 internal debug/development docs
- Rewrite hero section for clarity (explain what TPMJS is in seconds)
- Add "What is TPMJS?" section to landing page
- Fix hardcoded emails to hello@tpmjs.com
- Fix hardcoded dates to December 2024
- Add package metadata (author, license, repository) to all published packages
- Clean up AI-sounding language throughout
- Add comprehensive LAUNCH_REVIEW.md with checklist

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

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

.github/workflows/release.yml

@@ -23,7 +23,7 @@ jobs:
 
       - uses: actions/setup-node@v4
         with:
-          node-version: 21
+          node-version: 22
           cache: 'pnpm'
           registry-url: 'https://registry.npmjs.org'