Make module names consistent and remove redundant module casting (#909)

Address the inconsistent naming of smart modules by removing all "Module" suffixes and aligning filenames with class names. Removes the casting of modules to the correct module type now that is is redundant. Update the adding of iot modules to use the ModuleName class rather than a free string.

kasa/smart/modules/waterleaksensor.py

@@ -0,0 +1,66 @@
+"""Implementation of waterleak module."""
+
+from __future__ import annotations
+
+from enum import Enum
+from typing import TYPE_CHECKING
+
+from ...feature import Feature
+from ..smartmodule import SmartModule
+
+if TYPE_CHECKING:
+    from ..smartdevice import SmartDevice
+
+
+class WaterleakStatus(Enum):
+    """Waterleawk status."""
+
+    Normal = "normal"
+    LeakDetected = "water_leak"
+    Drying = "water_dry"
+
+
+class WaterleakSensor(SmartModule):
+    """Implementation of waterleak module."""
+
+    REQUIRED_COMPONENT = "sensor_alarm"
+
+    def __init__(self, device: SmartDevice, module: str):
+        super().__init__(device, module)
+        self._add_feature(
+            Feature(
+                device,
+                id="water_leak",
+                name="Water leak",
+                container=self,
+                attribute_getter="status",
+                icon="mdi:water",
+                category=Feature.Category.Debug,
+            )
+        )
+        self._add_feature(
+            Feature(
+                device,
+                id="water_alert",
+                name="Water alert",
+                container=self,
+                attribute_getter="alert",
+                icon="mdi:water-alert",
+                category=Feature.Category.Primary,
+            )
+        )
+
+    def query(self) -> dict:
+        """Query to execute during the update cycle."""
+        # Water leak information is contained in the main device info response.
+        return {}
+
+    @property
+    def status(self) -> WaterleakStatus:
+        """Return current humidity in percentage."""
+        return WaterleakStatus(self._device.sys_info["water_leak_status"])
+
+    @property
+    def alert(self) -> bool:
+        """Return true if alarm is active."""
+        return self._device.sys_info["in_alarm"]