Semantic search w/openai API

[mbertrand]

As a user, I'd like to ask questions and get relevant answers back based on content from all open course data.

Designs and Mockups

https://github.com/openai/openai-cookbook/blob/main/examples/Question_answering_using_embeddings.ipynb
https://supabase.com/blog/chatgpt-supabase-docs
https://www.youtube.com/watch?v=Yhtjd7yGGGA
https://www.youtube.com/watch?v=dXxQ0LR-3Hg
https://github.com/alejandro-ao/ask-multiple-pdfs

Acceptance Criteria:

• TBD