chore: Update Dockerfile and requirements.txt for Huggingface Spaces deployment

chore: Update import statement for InpaintingRequest in painting.py and refactor code to use shared BaseModel for Painting and InpaintingRequest classes

chore: Update import statement for InpaintingRequest in painting.py and refactor code to use shared BaseModel for Painting and InpaintingRequest classes

chore: Update SDXL LORA TEXT-TO-IMAGE gradio UI theme to 'gradio/soft'

chore: Refactor code to use shared BaseModel for Painting and InpaintingRequest classes

chore: Refactor code to use shared BaseModel for Painting and InputFormat classes