Describe your suggestion

Use Neoforge Biome Modifiers to insert mob spawns into biomes instead of hardcoding which biome types to spawn mobs in

Benefits of the feature

Since Neoforge Biome Modifiers are data driven, they can be configured via Datapack which is better for Modpack Developers

Additional context

Here's the Neoforge documentation for Biome Modifiers: https://docs.neoforged.net/docs/worldgen/biomemodifier/

Added custom tags in 46c68a4.