This is a huge change, and basically breaks everything (as per usual!)
First of, this includes stuff like shaders so anything involving those
are broken and then fixed. A new BuildAssets cmake file is added to
aid in running AssetCompiler, and it seems to work fine on the engine
base assets.
The File API will eventually be revamped to handle this new way of
organizing the files and domains will eventually be gotten rid of all
together since I probably will replace it with game directory
priorities. As it stands right now, there isn't a way to easily
replace say - render_options.cfg with your own game-specific version.
Apple builds are probably broken by this commit (since I'm moving
around content and shader directories) to be fixed later.
All specialization constants are removed (they cause trouble in
WebGPU, since they don't support array sizing, and it was a pain
in Metal anyway) - they are now macro defined. WebGPU now runs, although
push constant emulation is not implemented yet.
