Material system design

[ASVIEST]

There are different important capabilities from material system:

1. Using standard material with variations with custom properties (change albedo, metallic, etc.)
2. Extend standard material with vertex shaders (simple example: grass wind shader). Main problem of this use case: it should integrate with PBR/lightning system vertex shader
3. Extend standard material with fragment shaders (simple example: lava animation). It should integrate with PBR/lightning system fragment shader.

TODO: progress