Pre-deployment non-lfs changes

Added a non-agent chain version for comparison

Cleaned the Wookieepedia scrapes further; updated the app (currently not using the agent version but the Wookieepedia retriever one)

Generated local vector store of many Wookieepedia pages instead of adding interactive search and vectorisation (may do so in the future).

Tried out an app version; the chat playground has browser issues, and the default playground is not ideal. Langsmith seems best for inspecting post-facto.

Playing around with sources and structure before connecting a LLM

Initial commit