List connection services

    Retrieve the list of available connection services and their active connections.

    Each service in the response includes:
    - name: Unique identifier for the service (e.g., 'box', 'google-drive')
    - logo_url: URL to the service's logo image
    - display_name: Human-readable name of the service
    - description: Description of the service and its capabilities
    - supports_sync: Whether this service supports file syncing
    - authenticator_parameters: Parameters needed for authentication
    - connections: List of active connections to this service

    Note: This view only lists active, non-deleted connections.