feat: various improvements in styles and layout

templates/booking/create/modal_cancel.html.twig

@@ -0,0 +1,22 @@
+{% extends 'htmx_modal.html.twig' %}
+
+{% block title %}Sicher?{% endblock %}
+
+{% block content %}
+    <div class="pb-8">
+        Willst du den Buchungsvorgang wirklich abbrechen?
+    </div>
+    <div class="flex justify-between">
+        <button type="button"
+                hx-post="{{ path('app_booking_cancel') }}"
+                hx-target="body"
+                class="button button--primary">
+            Abbrechen
+        </button>
+        <button type="button"
+                {{ stimulus_action('modal', 'close') }}
+                class="button button--secondary">
+            Weiter
+        </button>
+    </div>
+{% endblock %}