Feature/vulkan

[fabmax]

Completely rewritten Vulkan backend

• Full feature parity with the other backends
• Slighty faster than OpenGL backend
• Also works on macOS (via MoltenVK, this should work automatically)

Enabled by default, to get the old OpenGL backend back use:

KoolApplication(KoolConfigJvm(renderBackend = KoolConfigJvm.Backend.VULKAN)) {
    // ...
}

[Protoxy22]

This is a crazy update, I will test it on my Macbook M1 as soon as possible, I keep you tuned ;)