Feature: #97559 - Support property-based configuration for Extbase attributes 

Description 

PHP attributes in the Extbase context can now be configured using properties instead of an array of configuration values. This resolves a limitation that existed since the introduction of Extbase annotations in TYPO3 v9, where annotation configuration was restricted: all available options needed to be defined in a single array.

Since annotations were removed with forge#107229 in favor of PHP attributes, configuration options can now be defined in a more flexible and type-safe way.

use TYPO3\CMS\Extbase\Attribute\FileUpload;
use TYPO3\CMS\Extbase\Attribute\Validate;
use TYPO3\CMS\Extbase\DomainObject\AbstractEntity;
use TYPO3\CMS\Extbase\Domain\Model\FileReference;

class MyModel extends AbstractEntity
{
    #[Validate(validator: 'NotEmpty')]
    protected string $foo = '';

    #[FileUpload(
        validation: [
            'required' => true,
            'maxFiles' => 1,
            'fileSize' => ['minimum' => '0K', 'maximum' => '2M'],
            'allowedMimeTypes' => ['image/jpeg', 'image/png'],
        ],
        uploadFolder: '1:/user_upload/files/',
    )]
    protected ?FileReference $bar = null;
}

Impact 

This patch serves as a follow-up to forge#107229 and aims to improve the attribute configuration mechanism by using constructor property promotion in combination with strictly typed properties.

To maintain backwards compatibility, the first property of each attribute still accepts an array of configuration options. However, this behavior is deprecated and will be removed in TYPO3 v15.0 (see deprecation notice).

Developers are advised to migrate to single-property configuration when using PHP attributes in Extbase.