[DERCBOT-1609] Improving RAG System - Part 1

[assouktim]

In this first part of improvement of the RAG system, we proceeded as follows:

• Structuring the LLM response to obtain not only the answer, but also other information such as: the status of the response, the subject of the conversation, and the actual context used.
• Modifying the default prompt for condensing questions.
• Preparing the code for the multiple search stage.

[Benvii]

Thanks for this PR, see my comments.

[assouktim]

@Benvii It may be best not to merge immediately and instead wait until the second part. This way, we can test and evaluate all the changes at once, rather than having to repeat the tests, and impacting all prompts multiple times.