Check for templates before going live

We need users to have created some templates before they go live, so we
can see what kind of messages they intend to send.

We can do this automatically based on the work done in
https://github.com/alphagov/notifications-admin/pull/1892

app/main/views/service_settings.py

@@ -169,6 +169,9 @@ def request_to_go_live(service_id):
                 service_id, 'manage_settings'
             ) > 1
         ),
+        has_templates=(
+            service_api_client.count_service_templates(service_id) > 0
+        ),
     )
 
 

app/templates/views/service-settings/request-to-go-live.html

@@ -22,6 +22,10 @@
           has_team_members,
           'Another person in your team has the ‘Manage service’ permission',
         ) }}
+        {{ tick_cross_done_not_done(
+          has_templates,
+          'You’ve added some templates',
+        ) }}
       </ul>
       <p>
         You also need to:
@@ -35,7 +39,7 @@
           <a href="{{ url_for('main.service_settings', service_id=current_service.id) }}">settings</a> page
         </li>
         <li>
-          add the templates you want to start with, making sure they follow the GOV.UK Service Manual standards for
+          make sure your messages follow the GOV.UK Service Manual standards for
           <a href="https://www.gov.uk/service-manual/design/sending-emails-and-text-messages">writing text messages and emails</a>
         </li>
       </ul>