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/form/RequestHandlerInterface.php

@@ -0,0 +1,32 @@
+<?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\Form;
+
+/**
+ * Submits forms if they were submitted.
+ *
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ */
+interface RequestHandlerInterface
+{
+    /**
+     * Submits a form if it was submitted.
+     *
+     * @return void
+     */
+    public function handleRequest(FormInterface $form, mixed $request = null);
+
+    /**
+     * Returns true if the given data is a file upload.
+     */
+    public function isFileUpload(mixed $data): bool;
+}