Add support for services to Home Connect (#58768)

Co-authored-by: Erik Montnemery <erik@montnemery.com>

homeassistant/components/home_connect/api.py

@@ -113,6 +113,7 @@ class HomeConnectDevice:
         """Initialize the device class."""
         self.hass = hass
         self.appliance = appliance
+        self.entities = []
 
     def initialize(self):
         """Fetch the info needed to initialize the device."""