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/ChoiceList/Loader/AbstractChoiceLoader.php

@@ -0,0 +1,66 @@
+<?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\ChoiceList\Loader;
+
+use Symfony\Component\Form\ChoiceList\ArrayChoiceList;
+use Symfony\Component\Form\ChoiceList\ChoiceListInterface;
+
+/**
+ * @author Jules Pietri <jules@heahprod.com>
+ */
+abstract class AbstractChoiceLoader implements ChoiceLoaderInterface
+{
+    private ?iterable $choices;
+
+    /**
+     * @final
+     */
+    public function loadChoiceList(?callable $value = null): ChoiceListInterface
+    {
+        return new ArrayChoiceList($this->choices ??= $this->loadChoices(), $value);
+    }
+
+    public function loadChoicesForValues(array $values, ?callable $value = null): array
+    {
+        if (!$values) {
+            return [];
+        }
+
+        return $this->doLoadChoicesForValues($values, $value);
+    }
+
+    public function loadValuesForChoices(array $choices, ?callable $value = null): array
+    {
+        if (!$choices) {
+            return [];
+        }
+
+        if ($value) {
+            // if a value callback exists, use it
+            return array_map(fn ($item) => (string) $value($item), $choices);
+        }
+
+        return $this->doLoadValuesForChoices($choices);
+    }
+
+    abstract protected function loadChoices(): iterable;
+
+    protected function doLoadChoicesForValues(array $values, ?callable $value): array
+    {
+        return $this->loadChoiceList($value)->getChoicesForValues($values);
+    }
+
+    protected function doLoadValuesForChoices(array $choices): array
+    {
+        return $this->loadChoiceList()->getValuesForChoices($choices);
+    }
+}