support php8 attributes, fixes #97

[tacman]

    #[Feature(name: "abc")]
    #[Route('/demo', name: 'app_demo')]
    public function demo(): Response
    {
        return $this->render('app/index.html.twig', [
            'controller_name' => 'Demo',
        ]);
    }

works now, as does using this at the controller class level.

[tacman]

Any chance you can look at this?

[Chris53897]

Php 8 Attributes would be a great impovment.
Is there any news on this? @mKnoop