Layout-Umbauten:

- Standartisierung der Karten-/Template-Elemente (schließt #224)
- Verbesserung einiger Ansichten
- "schrumpfung"
- Code-Cleanups
- Trabsliteration Kategorien
u. v. m.

layouts/_default/card-btn.html

@@ -0,0 +1,7 @@
+<div class="card border-primary rounded-0 hover-shadow mb-4">
+  <a href="{{ .Permalink }}"><img class="card-img-top rounded-0" src="{{ .Params.image | relURL }}" alt="{{ .Title }}"></a>
+  <div class="card-body">
+    <h4 class="card-title"><a href="{{ .Permalink }}">{{ .Title }}</a></h4>
+    <a href="{{ .Permalink }}" class="btn btn-primary btn-sm text-uppercase" data-pagefind-ignore>{{ i18n "read_more"}}</a>
+  </div>
+</div>