Initial release of MbetterClient v1.0.0

- Complete cross-platform multimedia client application
- PyQt5 video player with dynamic overlay templates
- Flask web dashboard with JWT authentication
- REST API client with configurable endpoints
- Multi-threaded architecture with Queue-based messaging
- SQLite database with automatic migrations
- PyInstaller build configuration for executables
- Comprehensive documentation and build scripts
- Offline-first design with local asset fallbacks