Fix RVC config path resolution for fp32 GPU compatibility
Technical changes:
- Add RVC config files to engines/rvc/impl/configs/
- Use __file__-relative path resolution instead of cwd-relative paths
- Ensures configs are found regardless of ComfyUI launch directory
Resolves issues where GTX 1080/1080 Ti users got FileNotFoundError on configs/32k.json
diodiogod
5cd40199ae