refactor: add table column skeleton

Author: MatteoGabriele

app/components/Package/Table.vue

@@ -300,7 +300,7 @@ function getColumnLabel(id: ColumnId): string {
           >
             {{ getColumnLabel('security') }}
           </th>
-          <th class="w-8">
+          <th scope="col" class="w-8">
             <span class="sr-only">{{ getColumnLabel('selection') }}</span>
           </th>
         </tr>
@@ -330,6 +330,9 @@ function getColumnLabel(id: ColumnId): string {
             <td v-if="isColumnVisible('keywords')" class="py-3 px-3">
               <div class="h-4 w-32 bg-bg-muted rounded animate-pulse ms-auto" />
             </td>
+            <td class="py-3 px-3 w-8">
+              <div class="h-4 w-4 bg-bg-muted rounded animate-pulse ms-auto" />
+            </td>
           </tr>
         </template>