Compatible with Symfony > 6.0. Requires PHP >= 8.1

Enhancements

• Allow PHP 8.4
• Bump to PHPStan v2
• Fixed Twig deprecations
• Fixed PHP 8.4 syntax deprecations
• Fixed php-cs-fixer deprecations
• Translations update from Hosted Weblate (#206)

Involved in this release: @kevinpapst and @sggua and @weblate - thank you!