Add missing ComfyUI extension dependencies to requirements

- GitPython: for ComfyUI-Manager git operations
- opencv-python-headless: for image processing in extensions
- insightface: for face detection/recognition
- onnxruntime: for InsightFace models
- pyyaml: for config file parsing
- imageio-ffmpeg: for VideoHelperSuite

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

comfyui/requirements.txt

@@ -13,3 +13,9 @@ soundfile
 scikit-image
 piexif
 segment-anything
+GitPython
+opencv-python-headless
+insightface
+onnxruntime
+pyyaml
+imageio-ffmpeg