Upgrade to Gradio 5.23.0 to fix Python 3.13 audioop error

Remove version pins to fix dependency conflicts on HF Spaces

Fix tokenizers version for Python 3.13 compatibility

Reduce requirements to fix OOM on HF Spaces free tier

Fix torch version to 2.6.0 for Python 3.13 compatibility

Fix torch CPU version for HF Spaces deployment

Add complete Code Review NLP Assistant with Gradio UI, CodeBERT and CodeT5

Initial setup: requirements.txt and .gitignore