Add support for raytracing pipeline

[adriengivry]

Problem this feature should fix

Currently supported pipelines are graphics and compute. We should add support for raytracing pipelines.

Expected solution

The initial implementation should be done for Vulkan. DX12 will be added later.

• [API] Define struct orhi::data::RaytracingPipelineDesc
• [API] Define ctor to TPipeline taking an instance of const orhi::data::RaytracingPipelineDesc& as parameter
• [API] Define API/descs to support acceleration structures and other required resources
• [API] Define raytracing-related command buffer functionalities
• [VULKAN] Implement acceleration structures and other required resources
• [VULKAN] Implement raytracing pipeline creation
• [VULKAN] Implement raytracing-related command buffer functionalities