Add getRegionCount to WorldHeritageController and ViewModel

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Acceptance Criteria

• GET /api/v1/heritages/regions/count returns the correct response
• Response is formatted via a ViewModel

Tasks

• Create RegionCountViewModel

class RegionCountViewModel
{
    public function __construct(private readonly RegionCountDto $dto) {}

    public function toArray(): array
    {
        return $this->dto->toArray();
    }
}

• Add getRegionCount to WorldHeritageController

public function getRegionCount(GetRegionCountUseCase $useCase): JsonResponse
{
    $dto = $useCase->handle();
    $viewModel = new RegionCountViewModel($dto);

    return response()->json([
        'status' => 'success',
        'data' => $viewModel->toArray(),
    ], 200);
}

• Add route to routes/api.php

Route::get('/v1/heritages/regions/count', [WorldHeritageController::class, 'getRegionCount']);