N°8771 - Add Symfony form component to iTop core (#760)

- Add Symfony Form Component
- Add Symfony CSRF security component
- Add iTop default form template
- Add Twig debug extension to Twig Environment
- Add iTop abstract controller facility to get form builder
- Add Twig filter to make trans an alias of dict_s filter

lib/symfony/security-core/Authentication/Token/NullToken.php

@@ -0,0 +1,95 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Security\Core\Authentication\Token;
+
+use Symfony\Component\Security\Core\User\UserInterface;
+
+/**
+ * @author Wouter de Jong <wouter@wouterj.nl>
+ */
+class NullToken implements TokenInterface
+{
+    public function __toString(): string
+    {
+        return '';
+    }
+
+    public function getRoleNames(): array
+    {
+        return [];
+    }
+
+    public function getUser(): ?UserInterface
+    {
+        return null;
+    }
+
+    /**
+     * @return never
+     */
+    public function setUser(UserInterface $user)
+    {
+        throw new \BadMethodCallException('Cannot set user on a NullToken.');
+    }
+
+    public function getUserIdentifier(): string
+    {
+        return '';
+    }
+
+    /**
+     * @return void
+     */
+    public function eraseCredentials()
+    {
+    }
+
+    public function getAttributes(): array
+    {
+        return [];
+    }
+
+    /**
+     * @return never
+     */
+    public function setAttributes(array $attributes)
+    {
+        throw new \BadMethodCallException('Cannot set attributes of NullToken.');
+    }
+
+    public function hasAttribute(string $name): bool
+    {
+        return false;
+    }
+
+    public function getAttribute(string $name): mixed
+    {
+        return null;
+    }
+
+    /**
+     * @return never
+     */
+    public function setAttribute(string $name, mixed $value)
+    {
+        throw new \BadMethodCallException('Cannot add attribute to NullToken.');
+    }
+
+    public function __serialize(): array
+    {
+        return [];
+    }
+
+    public function __unserialize(array $data): void
+    {
+    }
+}