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/DateFormat/HourTransformer.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\Polyfill\Intl\Icu\DateFormat;
+
+/**
+ * Base class for hour transformers.
+ *
+ * @author Eriksen Costa <eriksen.costa@infranology.com.br>
+ *
+ * @internal
+ */
+abstract class HourTransformer extends Transformer
+{
+    /**
+     * Returns a normalized hour value suitable for the hour transformer type.
+     *
+     * @param int    $hour   The hour value
+     * @param string $marker An optional AM/PM marker
+     *
+     * @return int The normalized hour value
+     */
+    abstract public function normalizeHour(int $hour, ?string $marker = null): int;
+}