v1.38.0

• engine: a new feature to set a transform on the global-scale fog [⚠️ Recompile materials]
• engine: large-scale fog can now be opted-out on a per-renderable basis
• engine: improve froxelizer resource efficiency [⚠️ Recompile materials]
• matc: better accounting and validation of used samplers in user materials
• engine: add support for sampling fog color from a custom texture [⚠️ Recompile materials]
• vulkan: introduce new custom swapchain API
• vulkan: new context sharing API