Add events calendar with ICS feed and switch content naming to English

Elternbeirat.Web/wwwroot/app.css

@@ -63,6 +63,50 @@ h1:focus {
     margin-bottom: 1rem;
 }
 
+/* Event list on /termine */
+.event-list {
+    list-style: none;
+    padding: 0;
+}
+
+.event-list li {
+    padding: 0.75rem 0;
+    border-bottom: 1px solid #eee;
+}
+
+.event-list time {
+    display: block;
+    color: #777;
+    font-size: 0.85rem;
+}
+
+.event-title {
+    font-size: 1.1rem;
+    font-weight: 600;
+}
+
+.event-location::before {
+    content: " · ";
+    color: #777;
+}
+
+.event-location {
+    color: #555;
+}
+
+.event-note {
+    margin: 0.25rem 0 0;
+    color: #444;
+}
+
+.event-list-past {
+    color: #777;
+}
+
+.event-list-past .event-title {
+    font-weight: 400;
+}
+
 .valid.modified:not([type=checkbox]) {
     outline: 1px solid #26b050;
 }