chore: remove unused app_resnet9.py

fix: update deprecated use_column_width to use_container_width

Switch to app.py for deployment with correct SimpleCNN model

Update ResNet9 model architecture to match saved model's structure

Fix model filename in app_resnet9.py to match actual filename

Update Docker and space configuration for Hugging Face Spaces

Update SDK to docker-streamlit in space.yml

Initial commit for Hugging Face Space deployment with ResNet9 model

Initial commit with essential files