Fix docx dependency (use python-docx)

added pdfplumber and docx in rquirements.txt

added file upload feature

added readme and requirements.txt changes

Force Python 3.10 to fix Gradio audioop crash

Fix Python 3.13 audioop issue for Gradio

Fix torch pinning for Python 3.13 HF Spaces

Pin compatible gradio and huggingface_hub versions

Initial AutoGrader setup

initial commit