docs: comprehensive project summary

Complete documentation covering:
- Repository relationship (App2 vs LocationForm)
- What has been implemented (backend, frontend, docs)
- Architecture patterns (Clean Architecture, CQRS, Repository)
- What's missing and recommended next steps
- SSO/Authentication options
- Testing instructions
- Deployment considerations
- Key files reference
- Summary statistics

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

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

Author: Ira2222