fix: set roommapping when it is only one room (#203)

* fix: set roommapping when it is only one room

* fix: add len check

roborock/version_1_apis/roborock_client_v1.py

@@ -277,6 +277,8 @@ async def get_room_mapping(self) -> list[RoomMapping] | None:
         """Gets the mapping from segment id -> iot id. Only works on local api."""
         mapping: list = await self.send_command(RoborockCommand.GET_ROOM_MAPPING)
         if isinstance(mapping, list):
+            if not isinstance(mapping[0], list) and len(mapping) == 2:
+                return [RoomMapping(segment_id=mapping[0], iot_id=mapping[1])]
             return [
                 RoomMapping(segment_id=segment_id, iot_id=iot_id)  # type: ignore
                 for segment_id, iot_id in [unpack_list(room, 2) for room in mapping if isinstance(room, list)]