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-csrf/TokenStorage/TokenStorageInterface.php

@@ -0,0 +1,47 @@
+<?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\Csrf\TokenStorage;
+
+/**
+ * Stores CSRF tokens.
+ *
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ */
+interface TokenStorageInterface
+{
+    /**
+     * Reads a stored CSRF token.
+     *
+     * @throws \Symfony\Component\Security\Csrf\Exception\TokenNotFoundException If the token ID does not exist
+     */
+    public function getToken(string $tokenId): string;
+
+    /**
+     * Stores a CSRF token.
+     *
+     * @return void
+     */
+    public function setToken(string $tokenId, #[\SensitiveParameter] string $token);
+
+    /**
+     * Removes a CSRF token.
+     *
+     * @return string|null Returns the removed token if one existed, NULL
+     *                     otherwise
+     */
+    public function removeToken(string $tokenId): ?string;
+
+    /**
+     * Checks whether a token with the given token ID exists.
+     */
+    public function hasToken(string $tokenId): bool;
+}