Refactor app.py: improve code formatting and enhance readability

Refactor app.py: update demo description, enhance PDF handling, and improve model loading functions

Enhance model loading in indexing functions for BiGemma3 and ColGemma3

Update README.md and app.py: change SDK version to 6.0.2 and enhance error handling in document indexing

Update README.md and app.py: change SDK version and modify heatmap figure creation

Refactor requirements.txt: streamline dependencies and update package sources

Update app.py

Update app.py

Update app.py

Update app.py

Update app.py

Update requirements.txt

VARAG initial commit - Adithya s K

first push

initial commit