Use uniform blocks in most shaders

[tatjam]

Instead of setting all the transform matrices (which are quite a few in our "double" world) every frame, we can create a uniform block and set that instead.

This should offer a performance improvement (albeit possibly minor) as instead of (5 * object) uniform sets, we would have a single call at the start of the frame. Implementation details here: https://learnopengl.com/Advanced-OpenGL/Advanced-GLSL