vulkan ray tracing experiment
based on https://github.com/SaschaWillems/Vulkan
https://developer.nvidia.com/rtx/raytracing/vkray
https://www.khronos.org/blog/ray-tracing-in-vulkan
https://developer.nvidia.com/blog/vulkan-raytracing/