tweak the vision_api prompt, create configuration files, minor tweak to main script

added winnie-the-pooh mode; and clean up question by user_id

added more questions

finishing up the app: UI, content understanding, questionaire, coaching

to create RAGAs result with triad of metrics

cache chroma_db, fine-tuned-embeddings, etc.

added ux, vision_api, qna.txt

added trulens implementation for evaluation

added all necessary pdfs

added HI Mock Exam Oct 2014 pdf; added gitattributes

added HI Chapter Summary pdf file