Load model from H5 format for HF Spaces compatibility

Support multiple model formats (SavedModel, H5, keras)

Upgrade TensorFlow to 2.15 for model format compatibility

Revert to use_column_width for Streamlit 1.35 compatibility

Optimize for HF Spaces deployment

Reorganize repo structure

Retrain M3 on real CASIA v2 data and fix ELA/normalization in app.py

feat: Add full implementation and HF Space artifacts