Refactor workflow classes and forms

- the workflow controller add a context to each transition;
- the state of the entity workflow is applyied using a dedicated marking store
- the method EntityWorkflow::step use the context to associate the new step with the future destination user, cc users and email. This makes the step consistent at every step.
- this allow to remove some logic which was processed in eventSubscribers,
- as counterpart, each workflow must specify a dedicated marking_store:

```yaml
framework:
    workflows:
        vendee_internal:
            # ...
            marking_store:
                service: Chill\MainBundle\Workflow\EntityWorkflowMarkingStore
```

src/Bundle/ChillMainBundle/Workflow/EventSubscriber/NotificationOnTransition.php

@@ -23,7 +23,13 @@ use Symfony\Component\Workflow\Registry;
 
 class NotificationOnTransition implements EventSubscriberInterface
 {
-    public function __construct(private readonly EntityManagerInterface $entityManager, private readonly \Twig\Environment $engine, private readonly MetadataExtractor $metadataExtractor, private readonly Security $security, private readonly Registry $registry) {}
+    public function __construct(
+        private readonly EntityManagerInterface $entityManager,
+        private readonly \Twig\Environment $engine,
+        private readonly MetadataExtractor $metadataExtractor,
+        private readonly Security $security,
+        private readonly Registry $registry
+    ) {}
 
     public static function getSubscribedEvents(): array
     {
@@ -85,7 +91,10 @@ class NotificationOnTransition implements EventSubscriberInterface
                 'dest' => $subscriber,
                 'place' => $place,
                 'workflow' => $workflow,
-                'is_dest' => \in_array($subscriber->getId(), array_map(static fn (User $u) => $u->getId(), $entityWorkflow->futureDestUsers), true),
+                'is_dest' => \in_array($subscriber->getId(), array_map(
+                    static fn (User $u) => $u->getId(),
+                    $entityWorkflow->getCurrentStep()->getDestUser()->toArray()
+                ), true),
             ];
 
             $notification = new Notification();