feat: CreateMangaFromMangadex endpoint + tests, missing image saving

src/Domain/Manga/Application/CommandHandler/CreateMangaFromMangadexHandler.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Domain\Manga\Application\CommandHandler;
+
+use App\Domain\Manga\Application\Command\CreateMangaFromMangadex;
+use App\Domain\Manga\Domain\Contract\Provider\MangaProviderInterface;
+use App\Domain\Manga\Domain\Contract\Repository\MangaRepositoryInterface;
+use App\Domain\Manga\Domain\Exception\MangaNotFoundException;
+use App\Domain\Manga\Domain\Model\ValueObject\ExternalId;
+
+readonly class CreateMangaFromMangadexHandler
+{
+    public function __construct(
+        private MangaProviderInterface $mangaProvider,
+        private MangaRepositoryInterface $mangaRepository
+    ) {}
+
+    public function handle(CreateMangaFromMangadex $command): void
+    {
+        $manga = $this->mangaProvider->findByExternalId(new ExternalId($command->externalId));
+        
+        if ($manga === null) {
+            throw new MangaNotFoundException('Manga not found on Mangadex');
+        }
+
+        $this->mangaRepository->save($manga);
+    }
+}