Allow getting Annotated features from modules (#1018)

Co-authored-by: Teemu R. <tpr@iki.fi>

kasa/smart/modules/fan.py

@@ -2,8 +2,11 @@
 
 from __future__ import annotations
 
+from typing import Annotated
+
 from ...feature import Feature
 from ...interfaces.fan import Fan as FanInterface
+from ...module import FeatureAttribute
 from ..smartmodule import SmartModule
 
 
@@ -46,11 +49,13 @@ class Fan(SmartModule, FanInterface):
         return {}
 
     @property
-    def fan_speed_level(self) -> int:
+    def fan_speed_level(self) -> Annotated[int, FeatureAttribute()]:
         """Return fan speed level."""
         return 0 if self.data["device_on"] is False else self.data["fan_speed_level"]
 
-    async def set_fan_speed_level(self, level: int) -> dict:
+    async def set_fan_speed_level(
+        self, level: int
+    ) -> Annotated[dict, FeatureAttribute()]:
         """Set fan speed level, 0 for off, 1-4 for on."""
         if level < 0 or level > 4:
             raise ValueError("Invalid level, should be in range 0-4.")
@@ -61,11 +66,11 @@ class Fan(SmartModule, FanInterface):
         )
 
     @property
-    def sleep_mode(self) -> bool:
+    def sleep_mode(self) -> Annotated[bool, FeatureAttribute()]:
         """Return sleep mode status."""
         return self.data["fan_sleep_mode_on"]
 
-    async def set_sleep_mode(self, on: bool) -> dict:
+    async def set_sleep_mode(self, on: bool) -> Annotated[dict, FeatureAttribute()]:
         """Set sleep mode."""
         return await self.call("set_device_info", {"fan_sleep_mode_on": on})