Refactor market recommender module and update API routes

- Renamed the `gecko_market_recommender` to `market_recommender` for clarity and consistency in naming conventions.
- Introduced a new `market_recommender.py` file, implementing a synchronous approach for fetching market data using the CoinGecko API, enhancing performance and maintainability.
- Updated the FastAPI application to include the new market recommender route at `/api/market-recommender`, replacing the previous gecko market endpoint.
- Enhanced the overall structure of the market data processing, including improved logging and error handling for better traceability.
- This refactor lays the groundwork for future enhancements and integrations with the Drift protocol.

Author: goldhaxx