Issue #3500209: Use attributes for DigitValidator plugin

Related to #3500209

src/Plugin/FapiValidationValidator/DigitValidator.php

@@ -3,17 +3,20 @@
 namespace Drupal\fapi_validation\Plugin\FapiValidationValidator;
 
 use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\StringTranslation\TranslatableMarkup;
+use Drupal\fapi_validation\Attribute\FapiValidationValidator;
 use Drupal\fapi_validation\FapiValidationValidatorsInterface;
 use Drupal\fapi_validation\Validator;
 
 /**
  * Fapi Validation Plugin for Digit validation.
- *
- * @FapiValidationValidator(
- *   id = "digit",
- *   error_message = "Use only digits on %field."
- * )
  */
+#[FapiValidationValidator(
+  id: 'digit',
+  label: new TranslatableMarkup('Alpha Numeric'),
+  description: new TranslatableMarkup('Transform input value to digit.'),
+  error_message: 'Use only digits on %field.',
+)]
 class DigitValidator implements FapiValidationValidatorsInterface {
 
   /**