Growing Garden (IW & UG Datapack)

Deepturf growths now depend on shimmerweeds! That means the dark spots will stay mostly dark, and also gives some control over where stuff will pop up. Apologies to those who use shimmerweeds as decor outside of flower pots.
Reworked the weights of some plants, removed mushrooms entirely from the pools as they have their own spreading mechanics already, so in their stead you have the new flowers!