refactor : reorganize codebase to DDD architecture

Backend:
- src/Api/Auth/State/ — MeProvider, UserPasswordHasherProcessor
- src/Api/Shared/Resource/ — AppVersion
- src/Api/Shared/State/ — AppVersionProvider
- src/Domain/, src/Application/, src/Infrastructure/ — skeleton ready
- User entity stays in src/Entity/ (framework, outside DDD)

Frontend:
- frontend/domains/ — skeleton ready for bounded contexts

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/Entity/User.php

@@ -10,9 +10,9 @@ use ApiPlatform\Metadata\Get;
 use ApiPlatform\Metadata\GetCollection;
 use ApiPlatform\Metadata\Patch;
 use ApiPlatform\Metadata\Post;
+use App\Api\Auth\State\MeProvider;
+use App\Api\Auth\State\UserPasswordHasherProcessor;
 use App\Repository\UserRepository;
-use App\State\MeProvider;
-use App\State\UserPasswordHasherProcessor;
 use DateTimeImmutable;
 use Doctrine\ORM\Mapping as ORM;
 use Symfony\Component\Security\Core\User\PasswordAuthenticatedUserInterface;