Port GPU HUD warp from TFORevive

Uses a shader to perform HUD warp. Significant performance improvement when enabled. Enable with: `hudwarp_use_gpu 1` Additional changes: - Change how `hudwarp_disable 1` works so that you get more FPS with it and it no longer breaks HUD scaling (warp-in effect) - Moved common MiscHook code to `MiscHooks.cpp`