Mob AI Tweaks

-Improved door zombie spawning logic. It was originally causing TPS drops, now it should not happen.

-Fixed door zombies having really weird spawning behavior.

-Fixed door zombie doors not despawning on the client side. Now, all door shields will try to actively despawn if there is no zombie holding them.

-Added #zombies_that_can_have_doors datapack tag, which allows other zombie mob types to spawn holding doors. By default, it only contains the vanilla zombie.

-Door zombies now hold doors based on the biome they spawn in.

-Door zombies now have a chance to spawn with iron doors in crazy mode.

-Door zombies now drop their doors if killed without breaking said door.

-Fixed door zombies spawning holding items, they no longer do that (unless some other mod or datapack forces them to spawn with items).