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/console/Formatter/OutputFormatterStyleInterface.php

@@ -20,33 +20,41 @@ interface OutputFormatterStyleInterface
 {
     /**
      * Sets style foreground color.
+     *
+     * @return void
      */
-    public function setForeground(string $color = null);
+    public function setForeground(?string $color);
 
     /**
      * Sets style background color.
+     *
+     * @return void
      */
-    public function setBackground(string $color = null);
+    public function setBackground(?string $color);
 
     /**
      * Sets some specific style option.
+     *
+     * @return void
      */
     public function setOption(string $option);
 
     /**
      * Unsets some specific style option.
+     *
+     * @return void
      */
     public function unsetOption(string $option);
 
     /**
      * Sets multiple style options at once.
+     *
+     * @return void
      */
     public function setOptions(array $options);
 
     /**
      * Applies the style to a given text.
-     *
-     * @return string
      */
-    public function apply(string $text);
+    public function apply(string $text): string;
 }