CTR Native Windows x86 beta build

Game assets are not included.

Create an assets folder next to ctr_native.exe and provide extracted NTSC-U retail CTR assets:

assets/
  BIGFILE.BIG
  SOUNDS/KART.HWL
  TEST.STR
  XA/
    ENG.XNF
    ENG/EXTRA/S00.XA ... S05.XA
    ENG/GAME/S00.XA ... S20.XA
    MUSIC/S00.XA ... S01.XA

Windows requirements:
- Windows x86 or x86_64
- OpenGL 3.3 capable GPU/driver

No MSYS2 install is required to run this release build.
