bridge-mautrix-whatsapp: add option for creating non-federated rooms

roles/matrix-bridge-mautrix-whatsapp/defaults/main.yml

@@ -37,6 +37,10 @@ matrix_mautrix_whatsapp_homeserver_token: ''
 
 matrix_mautrix_whatsapp_appservice_bot_username: whatsappbot
 
+# Whether or not created rooms should have federation enabled.
+# If false, created portal rooms will never be federated.
+matrix_mautrix_whatsapp_federate_rooms: true
+
 # Database-related configuration fields.
 #
 # To use SQLite, stick to these defaults.