implemented opening of external links in new tab

frontend/src/routes/bookmark/Template.svelte

@@ -1,4 +1,5 @@
 <script>
+    import { target }  from '../../urls.svelte';
     import Tags        from '../tags/TagList.svelte';
 
     let { bookmark } = $props();
@@ -12,7 +13,7 @@
     <legend class="date">
         {bookmark.timestamp.replace('T',' ')}
     </legend>
-    {@html bookmark.comment.rendered}
+    {@html target(bookmark.comment.rendered)}
     <Tags module="bookmark" id={bookmark.id} />
 </fieldset>
 {/if}