Major refactor: Remove marketplace intents, streamline property management, add new features

- Removed marketplace-intents feature module and related components
- Cleaned up documentation files and scripts
- Enhanced property management with new pin sharing and visibility features
- Added new API endpoints for intelligence, smart search, and public pins
- Improved authentication services and credit system
- Added new components for property data display and Zillow integration
- Streamlined database schema and removed unused migrations
- Updated UI components and layouts for better user experience

Author: alsetso