Adding grass shaders and animation sync

This morning I mainly fiddled around with getting a grass shader to behave in an aesthetically pleasing way, it took a few hours but now I think the result looks nice.

After that I considered what else to work on today, because there are so many systems and assets to be made but I ended up finally making a 'universal' function to handle the animations for both the local player scene as well as the remote players. The animation sync previously broke because I was using Godot's Animation Player, but switched to more complex Animation Tree which required some refactoring.