- Introduced vendoring for the VACE scribble generator to allow usage without the full upstream repository.
- Added `VENDORING.md` to document vendored files and update instructions.
- Updated `README.md` to include vendoring notes.
- Modified `IMPLEMENTATION_SUMMARY.md` to reflect changes in the scribble node.
- Enhanced `VACE_ANNOTATORS.md` with new parameters for inference mode and edge threshold.
- Created `scribble.py` and `scribble_loader.py` for model loading and preprocessing.
- Updated `vace_scribble_annotator.py` to integrate new model loading logic and fallback mechanisms.
- Added smoke tests for both fallback and model inference scenarios.
- Included a sample input image for testing purposes.
