Feat: Add description field to availability

templates/admin/system/availability/create.html.twig

@@ -2,6 +2,7 @@
 <div class="flex flex-col space-y-4 pb-8">
     {{ form_row(form.dateFrom) }}
     {{ form_row(form.dateTo) }}
+    {{ form_row(form.description) }}
 </div>
 <button type="submit" class="btn">
     Speichern

templates/admin/system/availability/index.html.twig

@@ -11,12 +11,15 @@
             <table class="data-table">
                 <thead>
                 <tr>
-                    <th class="w-1/3">
+                    <th class="w-1/4">
                         {{ knp_pagination_sortable(pagination, 'Datum von', 'availability.dateFrom') }}
                     </th>
-                    <th class="w-1/3">
+                    <th class="w-1/4">
                         {{ knp_pagination_sortable(pagination, 'Datum bis', 'availability.dateTo') }}
                     </th>
+                    <th class="w-1/4">
+                        {{ knp_pagination_sortable(pagination, 'Beschreibung', 'availability.description') }}
+                    </th>
                     <th></th>
                 </tr>
                 </thead>
@@ -29,6 +32,9 @@
                         <td>
                             {{ availability.dateTo|date('d.m.Y') }}
                         </td>
+                        <td>
+                            {{ availability.description|default('-') }}
+                        </td>
                         <td>
                             <div class="flex items-center space-x-2 justify-end">
                                 <button type="button"