Notifications: add admin (#11114)

readthedocs/notifications/admin.py

@@ -0,0 +1,15 @@
+"""Notifications admin."""
+
+from django.contrib import admin
+
+from readthedocs.notifications.models import Notification
+
+
+@admin.register(Notification)
+class NotificationAdmin(admin.ModelAdmin):
+    list_display = (
+        "id",
+        "message_id",
+        "attached_to_content_type",
+        "state",
+    )