Move rendering to a Real Engine™

[JoeLudwig]

Right now the rendering is cobbled together from https://github.com/SaschaWillems/Vulkan-glTF-PBR

We'll eventually want lighting, better animation, etc. Should consider moving rendering to a full fledged engine, preferably something open source. Maybe Godot?

[sophiabaldonado]

Not sure what all the requirements are for the engine but LÖVR may be worth looking at as well. It's open source, VR first/focused, and should be easy to extend.

[JoeLudwig]

One possibility: https://github.com/ConfettiFX/The-Forge