N°6934 - Symfony 6.4 - upgrade Symfony bundles to 6.4 (#580)

* Update Symfony lib to version ~6.4.0
* Update code missing return type
* Add an iTop general configuration entry to store application secret (Symfony mandatory parameter)
* Use dependency injection in ExceptionListener & UserProvider classes

lib/symfony/twig-bridge/Extension/ImportMapRuntime.php

@@ -0,0 +1,33 @@
+<?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\Bridge\Twig\Extension;
+
+use Symfony\Component\AssetMapper\ImportMap\ImportMapRenderer;
+
+/**
+ * @author Kévin Dunglas <kevin@dunglas.dev>
+ */
+class ImportMapRuntime
+{
+    public function __construct(private readonly ImportMapRenderer $importMapRenderer)
+    {
+    }
+
+    public function importmap(string|array|null $entryPoint = 'app', array $attributes = []): string
+    {
+        if (null === $entryPoint) {
+            trigger_deprecation('symfony/twig-bridge', '6.4', 'Passing null as the first argument of the "importmap" Twig function is deprecated, pass an empty array if no entrypoints are desired.');
+        }
+
+        return $this->importMapRenderer->render($entryPoint, $attributes);
+    }
+}