(major)feat: add new functionalities for AI-generated content detection

UPDATED: Updated ELA image processing in app.py and ela.py

🏗️ build(utils): update image preprocess and functionality expansion

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🐛 fix(image processing): ensure image consistency for gradient and minmax preprocessors

✨ feat(image processing): add MinMax pre-processing to image pipeline

✨ feat(image): add gradient processing in predict_image Function

✨ feat(predict): add Error Level Analysis to image prediction

✨ feat(ui): add sharpen and noise augmentation

🐛 fix(app): add input degrees having a bug for cases without augmentation

♻️ refactor(app): code cleanup

Refactor project interface and remove unused utility files

Refine UI layout and GOAT inference call

Update utils/goat.py

Update utils/goat.py

Create __init__.py

Create goat.py

Create utils/onnx.py