Stand-In Official Preprocessor ComfyUI Nodes

This repository provides a temporary ComfyUI node implementation of the Stand-In preprocessor, aiming to correct the misunderstanding of Stand-In’s preprocessing logic in [a/ComfyUI-WanVideoWrapper](https://github.com/kijai/ComfyUI-WanVideoWrapper). [w/We strongly recommend using the workflows provided in this repo to ensure proper compatibility and the best identity-preserving performance.]