feat: overview of teamers' custom availabilities

src/Menu/AdminMenuBuilder.php

@@ -74,6 +74,15 @@ class AdminMenuBuilder extends AbstractMenuBuilder
                 ],
             ],
         ]);
+        $menu->addChild('Verfügbarkeiten', [
+            'route' => 'app_administrative_availability_index',
+            'linkAttributes' => [
+                'title' => 'Verfügbarkeiten',
+            ],
+            'extras' => [
+                'icon' => 'calendar',
+            ],
+        ]);
         $settingsMenu = $menu->addChild('Einstellungen', [
             'linkAttributes' => [
                 'title' => 'Einstellungen',