* feat(chat): add name update * chore(linting): add flake8 * feat: add chat name edit
* 🗃️ add new tables for multiple brains * 🗑️ remove date input from fetch_user_id_from_credentials * ✨ new /brain endpoints * ♻️ refactor backend utils by splitting it into files * 💡 comments for next actions to update /upload