docs: update documentation

[Pa004]

• Fix test badge count (138 -> 141)
• Fix rules table: add Database leakage, remove Drift score (metric, not rule)
• Rewrite project structure tree with all current files
• Add Deployment section (SnapDeploy + Cloudflare Pages)
• Add Frontend Features section (toast, keyboard, history, share, export, caching, etc.)
• Add CI/CD section (GitHub Actions pipeline)
• Update Frontend Stack (React 19, TS 6.0, Vite 8.2, 15 tests)
• Rewrite frontend/README.md for Sentinel
• Add LICENSE (MIT)
• Add CHANGELOG.md (v0.1.0 + v0.2.0 with all 22 features)

[coderabbitai]

Important

• 🔍 Trigger review

This repository does not receive automatic reviews because it has fewer than 10 stars.

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Team

Run ID: d53b2510-b774-42c9-86b2-61dd725ee74a

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}