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/bootstrap80.php

@@ -0,0 +1,25 @@
+<?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.
+ */
+
+use Symfony\Polyfill\Intl\Icu as p;
+
+if (!function_exists('intl_is_failure')) {
+    function intl_is_failure(?int $errorCode): bool { return p\Icu::isFailure((int) $errorCode); }
+}
+if (!function_exists('intl_get_error_code')) {
+    function intl_get_error_code(): int { return p\Icu::getErrorCode(); }
+}
+if (!function_exists('intl_get_error_message')) {
+    function intl_get_error_message(): string { return p\Icu::getErrorMessage(); }
+}
+if (!function_exists('intl_error_name')) {
+    function intl_error_name(?int $errorCode): string { return p\Icu::getErrorName((int) $errorCode); }
+}