Refactored some code, using the new system:
- ParticleFactories is now included in GameRendering
- Migrated IntegrationHandler to BlockIntegration
- Migrated EntityFactory to MobIntegration
- Migrated TradeRegistry to TradeIntegration
- Migrated BiomeSpawnPlacement to BiomePlacement
Changes:
- Added support to Hanging Sign registry
- Added Goal registry on MobIntegration
- Reworked Biome placements