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/polyfill-intl-icu/Exception/NotImplementedException.php

@@ -0,0 +1,30 @@
+<?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\Polyfill\Intl\Icu\Exception;
+
+/**
+ * Base exception class for not implemented behaviors of the intl extension in the Locale component.
+ *
+ * @author Eriksen Costa <eriksen.costa@infranology.com.br>
+ */
+class NotImplementedException extends RuntimeException
+{
+    public const INTL_INSTALL_MESSAGE = 'Please install the "intl" extension for full localization capabilities.';
+
+    /**
+     * @param string $message The exception message. A note to install the intl extension is appended to this string
+     */
+    public function __construct(string $message)
+    {
+        parent::__construct($message.' '.self::INTL_INSTALL_MESSAGE);
+    }
+}