version 0.0.2

I'm still in the process of expanding the asset library and the unity version of the shaders aren't done yet, but here's some updates on the godot side of things!

- Added procedural checkerboard shader
- Added procedural cheese shader
- Added 6 levels of LOD to the procedural concrete shader,
  resulting in an increase in fps of around 500% (used to average around 100 fps, now averages 600 fps)

That's all for now, the unity shaders are gonna be a problem for future me