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/AuthenticationEvents.php

@@ -0,0 +1,34 @@
+<?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;
+
+use Symfony\Component\Security\Core\Event\AuthenticationSuccessEvent;
+
+final class AuthenticationEvents
+{
+    /**
+     * The AUTHENTICATION_SUCCESS event occurs after a user is authenticated
+     * by one provider.
+     *
+     * @Event("Symfony\Component\Security\Core\Event\AuthenticationSuccessEvent")
+     */
+    public const AUTHENTICATION_SUCCESS = 'security.authentication.success';
+
+    /**
+     * Event aliases.
+     *
+     * These aliases can be consumed by RegisterListenersPass.
+     */
+    public const ALIASES = [
+        AuthenticationSuccessEvent::class => self::AUTHENTICATION_SUCCESS,
+    ];
+}