[spike] research how to integrate 'OpenUSD to GLTF' importer into the toolchain

There are open source converters to do 'OpenUSD -> GLTF'. We need a tool in our portfolio to be able to export OpenUSD project into QDS. There is no point to do full OpenUSD importer, we already can work well with GLTF so let's build on that.

Simple success criterial:

1. Export Unreal Engine project to OpenUSD
2. Import the project to Qt and visualize that it matches on
   1. geometry
   2. lights
   3. asset locations
   4. data of used materials

Example project should be a project done using Unreal's HMI template.