feat: integrate with htmx

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

@@ -0,0 +1,11 @@
+{{ form_start(form, { 'attr': { 'hx-post': app.request.uri, 'hx-target': '#htmx-modal', 'hx-swap': 'outerHTML' } }) }}
+<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) }}