[TASK] Add new configuration controller

Classes/Controller/ConfigurationController.php

+<?php
+
+namespace SGalinski\SgMail\Controller;
+
+/***************************************************************
+ *  Copyright notice
+ *
+ *  (c) sgalinski Internet Services (https://www.sgalinski.de)
+ *
+ *  All rights reserved
+ *
+ *  This script is part of the TYPO3 project. The TYPO3 project is
+ *  free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  The GNU General Public License can be found at
+ *  http://www.gnu.org/copyleft/gpl.html.
+ *
+ *  This script is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  This copyright notice MUST APPEAR in all copies of the script!
+ ***************************************************************/
+
+use TYPO3\CMS\Backend\Template\Components\DocHeaderComponent;
+use TYPO3\CMS\Extbase\Mvc\Controller\ActionController;
+
+/**
+ * Controller for the configuration mode of the backend module
+ */
+class ConfigurationController extends ActionController {
+	/**
+	 * DocHeaderComponent
+	 *
+	 * @var DocHeaderComponent
+	 */
+	protected $docHeaderComponent;
+
+	/**
+	 *
+	 */
+	public function indexAction() {
+
+	}
+}

ext_tables.php

@@ -12,6 +12,7 @@ if (!defined('TYPO3_MODE')) {
 	[
 		'Mail' => 'index, sendTestMail, empty, reset',
 		'Queue' => 'index, sendMail, export',
+		'Configuration' => 'index',
 	],
 	[
 		'access' => 'user,group',