refactor: supprimer tout le code legacy MVC/Twig/Stimulus

Supprime toutes les couches pré-DDD pour ne garder que l'architecture
hexagonale (src/Domain/), les entités Doctrine et le front Vue.js SPA.

Supprimé :
- src/Controller/ (9 controllers Twig, garde SecurityController)
- src/Service/, src/Message/, src/MessageHandler/ (services et messages legacy)
- src/Manager/, src/Twig/, src/Form/ (UI legacy)
- src/Event/, src/EventListener/, src/EventSubscriber/QueueStatusSubscriber
- src/Client/MangadexClient.php (doublon du Domain)
- src/Interface/, src/Factory/, src/DataFixtures/, src/Scheduler/MainSchedule
- templates/ (tous sauf vue/ et base retiré — SecurityController = pur JSON)
- assets/controllers/ (20 Stimulus controllers), app.js, bootstrap.js, controllers.json

Modifié :
- config/routes.yaml : suppression du chargement des controllers legacy
- config/packages/messenger.yaml : suppression des routes legacy
- config/services.yaml : suppression des bindings legacy + entrées Domain\Import fantômes
- webpack.config.js : suppression entry 'app' et enableStimulusBridge
- src/Entity/Chapter.php : suppression #[Broadcast] (Turbo Streams legacy)

Déplacé :
- src/Factory/*.php → tests/Factory/ (namespace App\Tests\Factory)

tests/Factory/ChapterFactory.php

@@ -0,0 +1,75 @@
+<?php
+
+namespace App\Tests\Factory;
+
+use App\Entity\Chapter;
+use App\Repository\ChapterRepository;
+use Zenstruck\Foundry\ModelFactory;
+use Zenstruck\Foundry\Proxy;
+use Zenstruck\Foundry\RepositoryProxy;
+
+/**
+ * @extends ModelFactory<Chapter>
+ *
+ * @method        Chapter|Proxy                     create(array|callable $attributes = [])
+ * @method static Chapter|Proxy                     createOne(array $attributes = [])
+ * @method static Chapter|Proxy                     find(object|array|mixed $criteria)
+ * @method static Chapter|Proxy                     findOrCreate(array $attributes)
+ * @method static Chapter|Proxy                     first(string $sortedField = 'id')
+ * @method static Chapter|Proxy                     last(string $sortedField = 'id')
+ * @method static Chapter|Proxy                     random(array $attributes = [])
+ * @method static Chapter|Proxy                     randomOrCreate(array $attributes = [])
+ * @method static ChapterRepository|RepositoryProxy repository()
+ * @method static Chapter[]|Proxy[]                 all()
+ * @method static Chapter[]|Proxy[]                 createMany(int $number, array|callable $attributes = [])
+ * @method static Chapter[]|Proxy[]                 createSequence(iterable|callable $sequence)
+ * @method static Chapter[]|Proxy[]                 findBy(array $attributes)
+ * @method static Chapter[]|Proxy[]                 randomRange(int $min, int $max, array $attributes = [])
+ * @method static Chapter[]|Proxy[]                 randomSet(int $number, array $attributes = [])
+ */
+final class ChapterFactory extends ModelFactory
+{
+    /**
+     * @see https://symfony.com/bundles/ZenstruckFoundryBundle/current/index.html#factories-as-services
+     *
+     * @todo inject services if required
+     */
+    public function __construct()
+    {
+        parent::__construct();
+    }
+
+    /**
+     * @see https://symfony.com/bundles/ZenstruckFoundryBundle/current/index.html#model-factories
+     *
+     * @todo add your default values here
+     */
+    protected function getDefaults(): array
+    {
+        return [
+            'manga' => MangaFactory::new(),
+            'number' => self::faker()->randomFloat(2, 0, 999),
+            'volume' => self::faker()->optional()->numberBetween(1, 100),
+            'title' => self::faker()->optional()->sentence(3),
+            'localPath' => self::faker()->optional()->filePath(),
+            'externalId' => self::faker()->optional()->uuid(),
+            'cbzPath' => self::faker()->optional()->filePath(),
+            'visible' => true,
+        ];
+    }
+
+    /**
+     * @see https://symfony.com/bundles/ZenstruckFoundryBundle/current/index.html#initialization
+     */
+    protected function initialize(): self
+    {
+        return $this
+            // ->afterInstantiate(function(Chapter $chapter): void {})
+        ;
+    }
+
+    protected static function getClass(): string
+    {
+        return Chapter::class;
+    }
+}