Transition all Textured/ColoredQuad usages

- Upload textures using staging buffer
- Fixes SetOrtho logic
- More work on thermal visor rendering (still WIP)
- Rework Dawn backend initialization
- Support MoltenVK on Metal
- Various fixes & cleanup

Runtime/GuiSys/CSplashScreen.hpp

@@ -3,7 +3,6 @@
 #include "Runtime/CIOWin.hpp"
 #include "Runtime/CToken.hpp"
 #include "Runtime/Graphics/CTexture.hpp"
-#include "Runtime/Graphics/Shaders/CTexturedQuadFilter.hpp"
 
 namespace metaforce {