[REDBOX-496/498] Make the default route go to chat with LLM; chat with or without documents

[andy-symonds]

Context

As the first step of making chat more widely available to users, the default route should be changed to chat. In addition, the chat route now has logic to tell if no documents are selected chat_no_docs which results in sending question to GPT model or if a document is selcted, chat_with_docs, the document is stuffed into the context window along with the users' question.

Changes proposed in this pull request

Change default route to chat. Summarise and RAG functionality can still be accessed using keywords as seen in this screenshot

Chat as default is split into chat no documents:

and chat with documents:

Guidance to review

Please review and check that you are happy with the approach to selecting chat with documents or chat with no documents?

Relevant links

Things to check

• [x] I have added any new ENV vars in all deployed environments
• [x] I have tested any code added or changed
• [x] I have run integration tests

[lmwilkigov]

@andy-symonds Had a chat with Charlotte and demoed this branch. We think we should rename @chat_no_docs to @chat and keep @chat_with_docs the same

[andy-symonds]

Could we add our new route names to the tool tip? @lmwilkigov how does this work for you?

[andy-symonds]

@andy-symonds Had a chat with Charlotte and demoed this branch. We think we should rename @chat_no_docs to @chat and keep @chat_with_docs the same

@lmwilkigov done.