Add EntityFeature enum to Humidifier (#69092)

homeassistant/components/humidifier/const.py

@@ -1,4 +1,6 @@
 """Provides the constants needed for component."""
+from enum import IntEnum
+
 MODE_NORMAL = "normal"
 MODE_ECO = "eco"
 MODE_AWAY = "away"
@@ -27,4 +29,13 @@ DEVICE_CLASS_DEHUMIDIFIER = "dehumidifier"
 SERVICE_SET_MODE = "set_mode"
 SERVICE_SET_HUMIDITY = "set_humidity"
 
+
+class HumidifierEntityFeature(IntEnum):
+    """Supported features of the alarm control panel entity."""
+
+    MODES = 1
+
+
+# The SUPPORT_MODES constant is deprecated as of Home Assistant 2022.5.
+# Please use the HumidifierEntityFeature enum instead.
 SUPPORT_MODES = 1