Add zeroconf discovery to Freebox (#47045)

* Add zeroconf discovery to Freebox

- remove deprecated discovery
- tried with SSDP too but the presentation URL is not the same (*.fbxos.fr for zeroconf, http://mafreebox.freebox.fr/ for SSDP)
- so config entry unique_id should be the MAC (included into SSDP, but not zeroconf, can be retrieve from `fbx.system.get_config()`)
- DHCP discovery might be added in the future too

* host and port are required on zeroconf

* cleanup in other PR

homeassistant/components/freebox/__init__.py

@@ -25,26 +25,20 @@ CONFIG_SCHEMA = vol.Schema(
 
 
 async def async_setup(hass, config):
-    """Set up the Freebox component."""
-    conf = config.get(DOMAIN)
-
-    if conf is None:
-        return True
-
-    for freebox_conf in conf:
-        hass.async_create_task(
-            hass.config_entries.flow.async_init(
-                DOMAIN,
-                context={"source": SOURCE_IMPORT},
-                data=freebox_conf,
+    """Set up the Freebox integration."""
+    if DOMAIN in config:
+        for entry_config in config[DOMAIN]:
+            hass.async_create_task(
+                hass.config_entries.flow.async_init(
+                    DOMAIN, context={"source": SOURCE_IMPORT}, data=entry_config
+                )
             )
-        )
 
     return True
 
 
 async def async_setup_entry(hass: HomeAssistantType, entry: ConfigEntry):
-    """Set up Freebox component."""
+    """Set up Freebox entry."""
     router = FreeboxRouter(hass, entry)
     await router.setup()