CustomScoreboard v1.3-SNAPSHOT Update

This update brings significant improvements to the CustomScoreboard plugin:

New Features:
- Added %currency% placeholder for Vault's currency symbol
- Improved scoreboard entry handling for better performance
- Enhanced player join event handling for more reliable scoreboard assignment

Bug Fixes:
- Fixed scoreboard entry ordering issues
- Improved error handling for null player references
- Resolved potential memory leaks in scoreboard task management

Technical Improvements:
- Refactored scoreboard creation logic for better maintainability
- Enhanced documentation throughout the codebase
- Improved configuration validation for better user experience

The plugin now offers a more stable and feature-rich experience for server administrators looking to provide players with dynamic, real-time information in their scoreboards.