Feat: Make fees editable, duplicatable and add internal name

templates/admin/system/fee/form.html.twig

@@ -0,0 +1,11 @@
+{{ form_start(form) }}
+<div class="flex flex-col space-y-4 pb-8">
+    {{ form_row(form.name) }}
+    {{ form_row(form.nameInternal) }}
+    {{ form_row(form.value) }}
+</div>
+<button type="submit" class="btn">
+    Speichern
+</button>
+{{ form_rest(form) }}
+{{ form_end(form) }}