Fix path spacing for different Mammotion models

Fixes mikey0000#125

Update `path_spacing` entity to dynamically set min and max values based on Mammotion model.

* Set `min_value` to 15 and `max_value` to 30 for Yuka model.
* Set `min_value` to 20 and `max_value` to 35 for Luba model.
* Use `DeviceType` utility to determine the model type.

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For more details, open the [Copilot Workspace session](https://copilot-workspace.githubnext.com/mikey0000/Mammotion-HA/issues/125?shareId=XXXX-XXXX-XXXX-XXXX).

custom_components/mammotion/number.py

@@ -101,8 +101,8 @@ class MammotionConfigNumberEntityDescription(NumberEntityDescription):
         step=1,
         device_class=NumberDeviceClass.DISTANCE,
         native_unit_of_measurement=UnitOfLength.CENTIMETERS,
-        min_value=20,
-        max_value=35,
+        min_value=15 if DeviceType.is_yuka(coordinator.device_name) else 20,
+        max_value=30 if DeviceType.is_yuka(coordinator.device_name) else 35,
         set_fn=lambda coordinator, value: setattr(
             coordinator.operation_settings, "channel_width", value
         ),