Fixes #30736.
- `vk_enum_string_helper.h` is a generated file taken from the SDK (Vulkan-ValidationLayers). - `vk_mem_alloc.h` is a library from GPUOpen: https://github.com/GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator
- Added Navigation Agents and Obstacles. - Integrated Collision Avoidance. This work has been kindly sponsored by IMVU.