WIP: implementing windmill container changes

Agent-Logs-Url: https://github.com/nextcloud/all-in-one/sessions/6f198732-63c3-41b7-8b2e-1b5fa565ee21

Co-authored-by: szaimen <42591237+szaimen@users.noreply.github.com>

php/templates/includes/optional-containers.twig

@@ -220,6 +220,20 @@
         >
         <label for="whiteboard">Whiteboard</label>
     </p>
+    <p>
+        <input
+            type="checkbox"
+            id="windmill"
+            name="windmill"
+            {% if is_windmill_enabled == true %}
+                checked="checked"
+                data-initial-state="true"
+            {% else %}
+                data-initial-state="false"
+            {% endif %}
+        >
+        <label for="windmill">Windmill (workflow automation, needs port 3100 TCP open/forwarded in your firewall/router. Access the Windmill UI at <code>https://{{ domain }}:3100</code>)</label>
+    </p>
     <input class="options-form-submit" type="submit" value="Save changes" />
 </form>
 <p><strong>Minimal system requirements:</strong> When any optional container is enabled, at least 2GB RAM, a dual-core CPU and 40GB system storage are required. When enabling ClamAV,  Nextcloud Talk Recording-server or Fulltextsearch, at least 3GB RAM are required. For Talk Recording-server additional 2 vCPUs are required. When enabling everything, at least 5GB RAM and a quad-core CPU are required. Recommended are at least 1GB more RAM than the minimal requirement. For further advice and recommendations see <strong><a target="_blank" href="https://github.com/nextcloud/all-in-one/discussions/1335">this documentation</a></strong></p>