Vulkan_Instance contains variables related to persistent vulkan resources like instance, device, queue, swapchain, etc.
Vulkan_Instance is re-iniitalized only during window creation.
Vulkan_Resources contains data specific to current game context, i.e. current level.
Vulkan_Resources can be re-loaded during level change, level exit, etc.
This allows us to provide all functionality in executable file without providing additional data files.
Added bin2hex utility that does [spirv binary->cpp code] conversion.
Idea is based on vkQuake implementation.
r_renderAPI specifies rendering API to use (0 - opengl, 1 - vulkan).
r_renderAPICompareWindow shows additional window which does the same rendering as the main windows but uses different graphics API.
The idea is to use r_renderAPICompareWindow for debugging to be sure that both APIs render identical/similar pictures.
