Refactored code to use PHP8 attributes instead of annotations

In this change, Doctrine and validation annotations have been replaced with PHP8 Attributes. The Rector tool has been configured with a list of annotations to convert to attributes. As a consequence, the PHPStan's rules have been updated to reflect these changes. The PHP8's nullable operator (?) has been added where required, and comments in field declaration have been replaced with #[Attribute] syntax.

src/Bundle/ChillMainBundle/Entity/Location.php

@@ -65,18 +65,14 @@ class Location implements TrackCreationInterface, TrackUpdateInterface
     #[ORM\Column(type: \Doctrine\DBAL\Types\Types::STRING, length: 255, nullable: true)]
     private ?string $name = null;
 
-    /**
-     * @PhonenumberConstraint(type="any")
-     */
     #[Serializer\Groups(['read', 'write', 'docgen:read'])]
     #[ORM\Column(type: 'phone_number', nullable: true)]
+    #[PhonenumberConstraint(type: 'any')]
     private ?PhoneNumber $phonenumber1 = null;
 
-    /**
-     * @PhonenumberConstraint(type="any")
-     */
     #[Serializer\Groups(['read', 'write', 'docgen:read'])]
     #[ORM\Column(type: 'phone_number', nullable: true)]
+    #[PhonenumberConstraint(type: 'any')]
     private ?PhoneNumber $phonenumber2 = null;
 
     #[Serializer\Groups(['read'])]