update model repository reference in app.py

Upgraded the sdk_version as suggested from hugging face

Updated the model-centric approch

Model-centric approch added to the README.md

update README.md to include data-centric approach for improving model performance

update dependencies and refactor model loading in Gradio chat interface

add requirements file for Gradio and model dependencies

add initial project setup with Gradio chat interface and model integration

add initial project setup with Gradio chat interface and model integration

inital sample notebook

initial commit