Add logbook platforms (#37078)

* Add logbook platforms

* Fix logbook describe test

homeassistant/components/automation/logbook.py

@@ -0,0 +1,23 @@
+"""Describe logbook events."""
+from homeassistant.const import ATTR_ENTITY_ID, ATTR_NAME
+from homeassistant.core import callback
+
+from . import DOMAIN, EVENT_AUTOMATION_TRIGGERED
+
+
+@callback
+def async_describe_events(hass, async_describe_event):  # type: ignore
+    """Describe logbook events."""
+
+    @callback
+    def async_describe_logbook_event(event):  # type: ignore
+        """Describe a logbook event."""
+        return {
+            "name": event.data.get(ATTR_NAME),
+            "message": "has been triggered",
+            "entity_id": event.data.get(ATTR_ENTITY_ID),
+        }
+
+    async_describe_event(
+        DOMAIN, EVENT_AUTOMATION_TRIGGERED, async_describe_logbook_event
+    )