It works the same as [human-parser-comfyui-node](https://github.com/cozymantis/human-parser-comfyui-node), but I re-implemented InPlaceABNSync in pure Python so that it doesn't need a runtime build.
The pros and cons of this change:
pros
- The initial runtime is faster because it doesn't require a runtime build.
- No runtime error and complex setups for building the C++ code.
cons:
- After the initial execution, it could be slower than the original InPlaceABNSync.
related issue: https://github.com/cozymantis/human-parser-comfyui-node/issues/22
