Implement FBX model loader with scene node mapping and mesh processing#35

Copilot wants to merge 3 commits intodevel_44_RenderContexthyzboy/ULRE:devel_44_RenderContextfrom

copilot/fix-1db3f987-a054-4f93-8ebc-cd6b785e552dhyzboy/ULRE:copilot/fix-1db3f987-a054-4f93-8ebc-cd6b785e552dCopy head branch name to clipboard