feat: add timeline to main menu

templates/administrative/assignment/timeline.html.twig

@@ -1,6 +1,6 @@
 {% extends 'administrative/layout.html.twig' %}
 
-{% block title %}Timeline{% endblock %}
+{% block title %}Zeitleiste{% endblock %}
 
 {% macro cell(row, day) %}
     {% if colspan is defined and colspan > 1 %}
@@ -36,7 +36,7 @@
 {% block content %}
     <div class="flex items-start justify-between pb-4">
         <h1 class="text-2xl font-bold">
-            Timeline
+            Zeitleiste
         </h1>
         <div class="flex flex-col items-end space-y-2 md:flex-row md:items-center md:space-x-2 md:space-y-0">
             <button type="button"