Some improvements for MCreator with Loot Table Registry System

I have some ideas to improve Loot Tables uses in MCreator :

 1.add an way to link a loot table to a chest in a custom structure

 2.Injects loot table (these are loot table injected in vanilla ones, only adding the loot table in the vanilla one not overriding it)

Hope I can see this one day in MCreator