Added formatted cheat sheet html content for help

src/Controller/DefaultController.php

@@ -18,6 +18,9 @@ class DefaultController extends AbstractController
     #[Route('/', name: 'app_index')]
     public function index(): Response
     {
+        if ($this->isGranted('IS_AUTHENTICATED_FULLY')) {
+            return $this->redirect('/index.php/home');
+        }
         return $this->render('default/index.html.twig');
     }
 
@@ -35,6 +38,12 @@ class DefaultController extends AbstractController
         ]);
     }
 
+    #[Route('/cheat-sheet', name: 'app_cheat_sheet')]
+    public function cheatSheet(): Response
+    {
+        return $this->render('default/cheat-sheet.html.twig');
+    }
+
     #[Route('/reference-editor', name: 'app_reference_editor')]
     public function referenceEditor(EntityManagerInterface $emi): Response
     {