New terrain system

Today I have finally gotten the start of the terrain system in game. Next I will be working on terrain painting being implemented to allow for more garden customisation. Additionally the inventory system has been expanded to allow for equipment slots which will be used in the future for tools.

I have also learnt how to do shaders, which is how the terrain is working. it takes that black and white smudge image linked in this devlog and turns it into that terrain! additionally hovered props and selected birds will now get a pastel rainbow outline to show you what you are selecting.