docs: Update wiki for v2.0-beta.1 release
- Home.md: Add v2.0-beta.1 banner with key features
- Project-Overview.md: Rewrite with v2.0 architecture and test coverage
- Roadmap-and-Releases.md: Update status, add v2.0-beta.1 highlights
- Architecture.md: Rewrite with Control Plane + Agent architecture
- Security-and-Compliance.md: Add Wave 28 security fixes
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>