wip: backport form handing system from create flow to edit flow

src/Form/Service/Condition/AdditionalServicesMutabilityCondition.php

@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Form\Service\Condition;
+
+use App\Form\Model\BookingDtoInterface;
+use App\Form\Service\Contract\FieldConditionInterface;
+
+/**
+ * Condition that checks if additional services are mutable in the edit flow.
+ */
+class AdditionalServicesMutabilityCondition implements FieldConditionInterface
+{
+    public function evaluate(BookingDtoInterface $bookingDto, int $participantIndex, array $formData): bool
+    {
+        return false === $bookingDto->travel->additionalServicesMutable;
+    }
+
+    public function getDependentFields(): array
+    {
+        return [];
+    }
+
+    public function getDescription(): string
+    {
+        return 'Additional services are not mutable (edit flow)';
+    }
+}