Webgpu / Dawn rewrite todo list

[malytomas]

• font smoothing
• gui scissors
• dynamic resolution
• avoid fetching textures in scene render (already in binding group)
• asset manager fix (accessing textures while loading a model)
• hot-reloading fix (model keeps old textures referenced in bindings)
• first-time debug builds often fail due to debug_iterator_level
• world-space text bug
• world-space gui
• virtual reality
• improve performance
• consider replacing dawn cmake