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/Extension/HtmlSanitizer/HtmlSanitizerExtension.php

@@ -0,0 +1,36 @@
+<?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\Extension\HtmlSanitizer;
+
+use Psr\Container\ContainerInterface;
+use Symfony\Component\Form\AbstractExtension;
+
+/**
+ * Integrates the HtmlSanitizer component with the Form library.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class HtmlSanitizerExtension extends AbstractExtension
+{
+    public function __construct(
+        private ContainerInterface $sanitizers,
+        private string $defaultSanitizer = 'default',
+    ) {
+    }
+
+    protected function loadTypeExtensions(): array
+    {
+        return [
+            new Type\TextTypeHtmlSanitizerExtension($this->sanitizers, $this->defaultSanitizer),
+        ];
+    }
+}