fix: bump gradio to 5.9.1 (better Python compat)

fix: bump gradio to 5.9.1 (better Python compat)

fix: pin python 3.12 + audioop-lts for 3.13 fallback

fix: pin python 3.12 + audioop-lts for 3.13 fallback

docs: shorten short_description to fit 60-char HF limit

feat: initial commit of requirements.txt

feat: initial commit of app.py

initial commit