Streamline Setup: Enable Offline Model Execution

[mehul14062001]

This pull request updates the project to allow local execution. Key changes include:

1. Refactored the code to utilize pre-loaded or bundled models
2. Updated documentation to include steps for preparing the project for local execution
3. Included or updated necessary scripts/files for managing model dependencies directly within the repository

Links to changes:

1. knnvc_demo.py
2. hubconf_offline.py
3. README.md