Create a benchmark demo application

Create a really visually pleasing demo application for benchmarking that:

• has an option to enable/disable features
  • shadows
  • AO
  • MSAA
  • TAA
  • PAA
  • IBL lighting / normal lighting
  • Post-processing effects (QTBUG-76679)
• has an option to change model with different triangle counts:
  • 1k
  • 10k
  • 50k
  • 100k
  • 500k
• has an option to add more than one model
• has an option to change the type and number of lights
• has an option to change texture size:
  • 256x256
  • 512x512
  • 1024x1024
  • 2048x2048
  • 4096x4096
• has an option to change render mode:
  • offscreen
  • underlay
  • overlay
• has an option to change material:
  • principled material with/without textures
  • default material with/without textures
  • custom material (a couple from the material library)
• has an option to use either skybox or color backgroundmode

Application must use meshes and textures that can be shared with customers, so that they can benchmark their own hardware without our help.

The demo should preferable be editable in Qt Design Studio. Use Qt Quick Controls 2 for changing all of the options.