[ctor] Skip Doctrine entities with #[ORM\Entity] attribute in NewOverSettersRule

[TomasVotruba]

Entities marked with #[ORM\Entity] are usually set/get magically, so symplify.newOverSetters should not push their setters into the constructor.

Entity skipping already existed but relied on a raw string match:

str_contains($fileContents, '@ORM\Entity') || str_starts_with($fileContents, '#[Entity]')

The second branch was dead (files start with <?php) and missed the #[ORM\Entity] attribute form entirely.

Now detection reads attribute reflection for Doctrine\ORM\Mapping\Entity, with the @ORM\Entity annotation kept as fallback. Added a source + fixture covering the attribute form.