FIX: mpa, nuxt4 future, improvements in intro and services

Added mpa support, nuxt4 future compatibility, improvements in intro and services

nuxt.config.ts

@@ -1,5 +1,8 @@
 export default defineNuxtConfig({
   ssr: true,
+  future: {
+    compatibilityVersion: 4,
+  },
 
   nitro: {
     prerender: {
@@ -36,6 +39,10 @@ export default defineNuxtConfig({
   },
 
   app: {
+    pageTransition: {
+      name: 'page',
+      mode: 'out-in',
+    },
     head: {
       htmlAttrs: { lang: 'de' },
       link: [