- make staging/prep phase use separate command buffer
- flush this command buffer early if needed
- move command pool to its own module
- move shader loading stuff to pipeline module
- cleanup lots of command buffer passing for model loading, it can use staging explicitly now
track brush models movement and update lights grid clusters with model transform and stuff
also implement animated textures for rtx
and also increase per-cluster lights limits
Now rendering submodules specify their colors and matrices using
VK_RenderState global stat api. This is a trade-off between making all
submodules track their state on their own, or managing that state
centrally.
