✨(webhook) add webhook logic and synchronization utils

adding webhooks logic to send serialized team memberships data
to a designated serie of webhooks.

src/backend/demo/tests/test_commands_create_demo.py

@@ -35,7 +35,7 @@ def test_commands_create_demo():
 
 def test_commands_createsuperuser():
     """
-    The createsuperuser management command should create an use
+    The createsuperuser management command should create a user
     with superuser permissions.
     """