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/humiditysensor.py

@@ -0,0 +1,55 @@
+"""Implementation of humidity module."""
+
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+from ...feature import Feature
+from ..smartmodule import SmartModule
+
+if TYPE_CHECKING:
+    from ..smartdevice import SmartDevice
+
+
+class HumiditySensor(SmartModule):
+    """Implementation of humidity module."""
+
+    REQUIRED_COMPONENT = "humidity"
+    QUERY_GETTER_NAME = "get_comfort_humidity_config"
+
+    def __init__(self, device: SmartDevice, module: str):
+        super().__init__(device, module)
+        self._add_feature(
+            Feature(
+                device,
+                id="humidity",
+                name="Humidity",
+                container=self,
+                attribute_getter="humidity",
+                icon="mdi:water-percent",
+                unit="%",
+                category=Feature.Category.Primary,
+            )
+        )
+        self._add_feature(
+            Feature(
+                device,
+                id="humidity_warning",
+                name="Humidity warning",
+                container=self,
+                attribute_getter="humidity_warning",
+                type=Feature.Type.BinarySensor,
+                icon="mdi:alert",
+                category=Feature.Category.Debug,
+            )
+        )
+
+    @property
+    def humidity(self):
+        """Return current humidity in percentage."""
+        return self._device.sys_info["current_humidity"]
+
+    @property
+    def humidity_warning(self) -> bool:
+        """Return true if humidity is outside of the wanted range."""
+        return self._device.sys_info["current_humidity_exception"] != 0