fix(renderer): merge similar renderer types

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

frontend/src/components/render-page/iframe-markdown-renderer.tsx

@@ -146,8 +146,7 @@ export const IframeMarkdownRenderer: React.FC = () => {
             slideOptions={slideOptions}
           />
         )
-      case RendererType.MOTD:
-      case RendererType.INTRO:
+      case RendererType.SIMPLE:
         return (
           <MarkdownDocument
             additionalOuterContainerClasses={'vh-100 bg-light overflow-y-hidden'}

frontend/src/components/render-page/window-post-message-communicator/rendering-message.ts

@@ -129,9 +129,8 @@ export type RendererToEditorMessageType =
 
 export enum RendererType {
   DOCUMENT = 'document',
-  INTRO = 'intro',
-  SLIDESHOW = 'slideshow',
-  MOTD = 'motd'
+  SIMPLE = 'simple',
+  SLIDESHOW = 'slideshow'
 }
 
 export interface BaseConfiguration {