Code Clean up, more testing

Remove unused code and classes.
Clean up code to remove all named constant from them and throw
deprecation alerts if used.
Add basic psalm setup in root folder and remove from www folder

vendor/symfony/service-contracts/LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2018-2022 Fabien Potencier
+Copyright (c) 2018-present Fabien Potencier
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

vendor/symfony/service-contracts/README.md

@@ -3,7 +3,7 @@ Symfony Service Contracts
 
 A set of abstractions extracted out of the Symfony components.
 
-Can be used to build on semantics that the Symfony components proved useful - and
+Can be used to build on semantics that the Symfony components proved useful and
 that already have battle tested implementations.
 
 See https://github.com/symfony/contracts/blob/main/README.md for more information.

vendor/symfony/service-contracts/ResetInterface.php

@@ -26,5 +26,8 @@ namespace Symfony\Contracts\Service;
  */
 interface ResetInterface
 {
+    /**
+     * @return void
+     */
     public function reset();
 }

vendor/symfony/service-contracts/ServiceProviderInterface.php

@@ -19,7 +19,7 @@ use Psr\Container\ContainerInterface;
  * @author Nicolas Grekas <p@tchwork.com>
  * @author Mateusz Sip <mateusz.sip@gmail.com>
  *
- * @template T of mixed
+ * @template-covariant T of mixed
  */
 interface ServiceProviderInterface extends ContainerInterface
 {

vendor/symfony/service-contracts/ServiceSubscriberTrait.php

@@ -66,12 +66,13 @@ trait ServiceSubscriberTrait
     #[Required]
     public function setContainer(ContainerInterface $container): ?ContainerInterface
     {
-        $this->container = $container;
-
+        $ret = null;
         if (method_exists(get_parent_class(self::class) ?: '', __FUNCTION__)) {
-            return parent::setContainer($container);
+            $ret = parent::setContainer($container);
         }
 
-        return null;
+        $this->container = $container;
+
+        return $ret;
     }
 }