Feat/texture updates

[QuantumEntangledAndy]

This adds features from #152 that I am adding here to make the PRs more modular

Specifically:

• Adds methods to copy data from a gpu texture to an array on the cpu, (useful for debugging)
• Changes binding of Texture3D to TextureCube which represents its actual backing data
• Adds actual Texture3D bindings
• Add 2D Texture array binding
• Add a method to update the values in a texture without recreating it
  • This is needed to perform live updates of textures without having to rebind the pipeline (this is used in Voxels and SDF #152 to make voxels more easily and quickly changed on the gpu)
• Some clippy fixes
• Sets name on the shader, useful for debugging

[voxelias]

Just couple questions, and I believe TextureKind should be re-implemented with native WGPU enum,

[voxelias]

Thank you very much! This part was really wanted!

[QuantumEntangledAndy]

Awesome, glad to help. I'll work these changes into my voxels and get materials working with it.

I'll see about adding a tera PR too after that