Roughly Enough IDs

All features courtesy of ChaosStrikez

• A couple of under-the-hood mixin improvements
  • Shouldn't affect anything in terms of gameplay
• Improved biome compatibility for hybrid servers (Mohist, CatServer, etc.)
  • REID's biome initialization should work correctly on them now
• Config-defined classes are allowed to apply biome init injection code
  • Chunk-Pregenerator comes pre-defined for more explicit compatibility than before
• Incompatibility screen when NEID is installed
  • Having both NEID and REID installed will very likely cause issues in worldgen, loading the world, network packets, etc.