Minor changes

Updated default values and openapi spec.

Watson Discovery & Security

Added Watson Discovery to the application.
Added basic security to the application to prevent it from being open to the public.

WxD RAG v3 Improved Efficiencies

Added improved efficiencies to make the applications and calls faster.
Updated the documentation.

WxD-Rag-v2

Refactored Application using up-to-date python libraries.