Version 1.2.2 - Database Storage and AFK System Improvements

Features:
- Added database storage support (SQLite and MySQL)
- Completely redesigned AFK system with countdown and movement detection
- Added free movement while in AFK mode
- Added protection from damage while in AFK mode
- Added dedicated world support recommendations for AFK
- Improved data persistence and reliability

Changes:
- Replaced YAML file storage with database storage
- Added 5-second countdown with movement detection for AFK
- Removed movement restrictions while in AFK mode
- Added automatic database table creation
- Added support for switching between SQLite and MySQL
- Improved AFK teleportation safety
- Added prevention of Nether/End AFK location setting
- Reduced database connection logging spam

Technical Updates:
- Implemented DatabaseManager for handling database connections
- Added proper connection pooling and error handling
- Improved data loading and saving performance
- Enhanced plugin stability with better data management
- Added boss bar for AFK countdown
- Improved database connection reliability
- Optimized database connection reuse
- Updated plugin version to 1.2.2