[Feature] Make use of RAG models

There may be a significant advantage for the bot utility if it can use models powered with Retrieval Augmented Generation (RAG) specific to the project.
I envision this either as a settings file that maintains a list of relevant GitHub repos (your project's repo, repos of frameworks or libraries being used), or the ability to use a RAG model maintained on OpenAI's side.
Just a thought.

No files, tests, or entry points are named. Start by locating the bot utility and its settings or configuration entry point, then clarify whether the goal is repository-based retrieval, an OpenAI-hosted RAG model, or both before defining completion criteria.

Written by the indexing model from the issue text.