feat: add history graph pattern

index.html

@@ -48,6 +48,7 @@
         <li><a href="./patterns/navigation-card.html">Navigation Card</a></li>
         <li><a href="./patterns/left-navigation.html">Left Navigation</a></li>
         <li><a href="./patterns/notifications.html">Notifications</a></li>
+        <li><a href="./patterns/history-graph.html">History Graph</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>