OrangeWhitelist

Fixes:

• Fixed spam of join/quit messages when kicking non-whitelisted players
• Prevented join message from being sent before kicking unauthorized players
• Removed quit messages for players kicked by the whitelist system

Improvements:

• Optimized memory usage with HashSet for tracking kicked players
• Synchronized join/quit event handling for better performance
• Adjusted event priority to HIGHEST for reliable message cancellation
• NOTE: Recommended server restart after updating for full changes to take effect