feat(cms,asset): add comprehensive test suite and finalize modules

- Add comprehensive test suite for CMS and Asset modules using Pest Framework
- Implement ContentTypeService::delete() protection against deletion of in-use content types
- Add CannotDeleteContentTypeInUseException for better error handling
- Fix DerivatPipelineRegistry::getAllPipelines() to handle object uniqueness correctly
- Fix VariantName::getScale() to correctly parse scales with file extensions
- Update CMS module documentation with new features, exceptions, and test coverage
- Add CmsTestHelpers and AssetTestHelpers for test data factories
- Fix BlockTypeRegistry to be immutable after construction
- Update ContentTypeService to check for associated content before deletion
- Improve BlockRendererRegistry initialization

Test coverage:
- Value Objects: All CMS and Asset value objects
- Services: ContentService, ContentTypeService, SlugGenerator, BlockValidator, ContentLocalizationService, AssetService, DeduplicationService, MetadataExtractor
- Repositories: All database repositories with mocked connections
- Rendering: Block renderers and ContentRenderer
- Controllers: API endpoints for both modules

254 tests passing, 38 remaining (mostly image processing pipeline tests)

src/Domain/Cms/Rendering/HeroBlockRenderer.php

@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace App\Domain\Cms\Rendering;
 
+use App\Domain\Cms\ValueObjects\BlockType;
 use App\Domain\Cms\ValueObjects\ContentBlock;
 
 final readonly class HeroBlockRenderer implements BlockRendererInterface
@@ -29,7 +30,7 @@ final readonly class HeroBlockRenderer implements BlockRendererInterface
 
     public function supports(string $blockType): bool
     {
-        return $blockType === \App\Domain\Cms\ValueObjects\BlockType::HERO;
+        return $blockType === BlockType::HERO;
     }
 }