Add support for shader reflection

[n-e-l]

For other sub-projects, like https://github.com/angelocarly/kiyo, it would be useful to have shader reflection.
This way it might be possible to add user-tweakable variables from the shaders.
https://www.reddit.com/r/GraphicsProgramming/comments/1f7f8dk/comment/ll7hesj/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button