[TASK] Add atleast one necessary public module, fix wrong Doc-Header

Classes/Hooks/PageLayoutController.php

@@ -39,8 +39,7 @@ use TYPO3\CMS\Extbase\Utility\LocalizationUtility;
 class PageLayoutController {
 
 	/**
-	 * Sets the default value for the pages author field
-	 * to the name of the logged-in user
+	 * Adds a Button to News-Pages which allows the user to switch to the News module
 	 *
 	 * @param array $parameters
 	 * @param CorePageLayoutController $controller

Configuration/Services.yaml

@@ -6,3 +6,6 @@ services:
 
     SGalinski\SgNews\:
         resource: '../Classes/*'
+
+    SGalinski\SgNews\Preview\PreviewRenderer:
+      public: true