ComfyUI Extension: ComfyUI-LivePortraitKJ-MPS

If you wish to incorporate these changes into your repo, feel free to open an issue and ask. The commits should be pretty clear, and I also label almost all changes with #HACK so a full text search will work too. Please let me know if you decide to incorporate any of these changes into your LivePortrait implementation so I can direct people to you repository. I do not intend to maintain this repo. Some operations are simply not supported on MPS and I didn't rewrite them. Most of my changes are just to .cuda calls and that sort of thing. Many operations are still done on CPU, so don't expect awesome performance.