feat: Add Circleback connector integration

- Implement CirclebackConnectForm for user input and configuration
- Update connector benefits to include Circleback features
- Add CirclebackConfig component for webhook configuration
- Integrate Circleback into connector selection and management UI
- Update connector constants and document mappings for Circleback

surfsense_web/lib/connectors/utils.ts

@@ -19,6 +19,7 @@ export const getConnectorTypeDisplay = (type: string): string => {
 		LUMA_CONNECTOR: "Luma",
 		ELASTICSEARCH_CONNECTOR: "Elasticsearch",
 		WEBCRAWLER_CONNECTOR: "Web Pages",
+		CIRCLEBACK_CONNECTOR: "Circleback",
 	};
 	return typeMap[type] || type;
 };