- Add `get_location` endpoint to retrieve location information with optional upstream inclusion.
- Introduce `get_proxy_list` and `get_proxy` endpoints for listing and retrieving proxy hosts.
- Implement `remove_location` and `remove_proxy` endpoints for deleting locations and proxy hosts respectively.
- Add `update_location` and `update_proxy` endpoints for modifying existing locations and proxy hosts.
- Create response structures for location and proxy host information.
- Implement tests for all new endpoints to ensure correct functionality and error handling.
