Better MOTD

Fixes

• Fixed PER_IP_STICKY animation (frames are now truly stable per IP)
• Fixed weightedRandom(...) seed behavior
• Fixed edge cases in sticky state cleanup
• Fixed single-line MOTD normalization

Improvements

• Removed reflection from Paper integration (faster and cleaner)
• Improved random generation using SplittableRandom
• Optimized MOTD rendering and placeholder handling
• Reduced allocations and unnecessary processing

Cleanup

• Removed unused code and constants
• Simplified internal logic across multiple services

Notes

• Fully compatible with Paper 1.21.x
• No config changes required