added packages to support markdown

added dummy pages for about and contact.
updated tailwind.config.js to include config/*.json to scan for classes.
refactored system basics. Removed component-props, using generic LayoutComponentDefinition and LayoutContext. cleanup component-map. Updated renderer to be more failsafe.

new abstracted components:
 vt-mega-menu,
vt-sidemenu,
vt-banner with 3 variants,
vt-header,
vt-homebutton,
vt-cartbutton,
vt-accountbutton,
vt-linkbutton,

src/app/[countryCode]/(main)/vt-contact/page.tsx

@@ -0,0 +1,12 @@
+import React from "react";
+
+export default function ContactPage() {
+  return (
+    <div className="content-container py-16">
+      <h1 className="text-3xl font-bold mb-4">Kontakt</h1>
+      <p>
+        Schreibe uns: <a href="mailto:info@vibentec-it.de">info@vibentec-it.de</a>
+      </p>
+    </div>
+  );
+}