implement button to create event in nextcloud

launch.html

@@ -289,6 +289,9 @@
             <button id="createMeetingButton" class="button primary" type="button" data-i18n="creator.createButton">
               Create Meeting
             </button>
+            <button id="createNextcloudButton" class="button primary" type="button" data-i18n="creator.nextcloudButton">
+                Create in Nextcloud Calendar
+            </button>
             <button id="createAdhocButton" class="button secondary" type="button" data-i18n="creator.adhocButton">
               Create Adhoc Link
             </button>
@@ -309,6 +312,10 @@
             <span data-i18n="creator.successMessage">Meeting created! Download your calendar file and open it to import the meeting into your personal calendar.</span>
             <a id="downloadIcsLink" class="button primary" style="margin-top: 12px; display: inline-block;" data-i18n="creator.downloadButton">Download ICS File</a>
           </div>
+
+          <div id="nextcloudStatus" class="success-message hidden" aria-live="polite"></div>
+
+          <div id="nextcloudError" class="error hidden" aria-live="assertive"></div>
         </div>
 
       </div>