[generate:command] Regression with the Annotation stops custom translations from working

[codebymikey]

The #4074 PR introduced a regression with the annotations.

The DrupalCommand annotation was missing the @ annotation token prefix, which stops translations from being detected for generated commands as it fails validation and marked as an invalid command in the following:

drupal-console/src/Application.php

Lines 123 to 129 in e582d88

	if (!$annotationValidator->isValidCommand(
	$serviceDefinition->getClass()
	)
	) {
	$invalidCommands[] = $name;
	continue;
	}