chore: adopt namespace pattern for accommodation booking controllers

templates/groups/booking/modal_inquiry_confirmation.html.twig

@@ -0,0 +1,18 @@
+{% extends 'htmx_modal.html.twig' %}
+
+{% block title %}Anfrage bestätigen{% endblock %}
+
+{% block content %}
+    <p class="mb-6">Möchtest du diese unverbindliche Anfrage jetzt absenden?</p>
+
+    {{ form_start(inquiryForm, { 'action': path('app_groups_booking_step_4') }) }}
+        <div class="flex flex-col space-y-4 md:flex-row md:space-y-0 justify-between">
+            <button type="submit" class="button button--primary">
+                Jetzt anfragen
+            </button>
+            <button type="button" class="button button--secondary" {{ stimulus_action('modal', 'close') }}>
+                Abbrechen
+            </button>
+        </div>
+    {{ form_end(inquiryForm) }}
+{% endblock %}