Add Slang tab to Gradio UI

Add natural-language slang normalization (idk -> i don'''t know, etc.)

Tune corrector to 86% on 998-sample dataset

Pin huggingface_hub<0.26 (Gradio 5.0 still imports HfFolder)

Pin python_version=3.10 (Gradio still uses pydub)

Upgrade to Gradio 5.x to fix Spaces localhost-check race

Upgrade to Gradio 5.x to fix Spaces localhost-check race

Upgrade to Gradio 5.x to fix Spaces localhost-check race

Rename Blocks to demo, bind 0.0.0.0:7860 for HF Space

Pin python_version=3.10 (avoid Py3.13 audioop removal)

Initial upload of Open Spell open-spell

initial commit