Add content cards group pattern and wire into card list layouts

index.html

@@ -42,6 +42,7 @@
         <li><a href="./patterns/object-card.html">Object Card</a></li>
         <li><a href="./patterns/object-group-card.html">Object Group Card</a></li>
         <li><a href="./patterns/navigation-card.html">Navigation Card</a></li>
+        <li><a href="./patterns/content-cards-group.html">Content Cards Group</a></li>
         <li><a href="./patterns/card-gruppe-mit-tastennavigation.html">Card Gruppe mit Tastennavigation</a></li>
         <li><a href="./patterns/formular-mit-abschnitten.html">Formular mit Abschnitten</a></li>
       </ul>