add ICON_NOT_FOUND

Author: tillsteinbach

weconnect/elements/warning_lights_status.py

@@ -162,4 +162,5 @@ class Category(Enum,):
         class IconColor(Enum,):
             YELLOW = 'Yellow'
             RED = 'Red'
+            ICON_NOT_FOUND = 'ICON_NOT_FOUND'
             UNKNOWN = 'unknown color'