Update server setup logic and add admin user creation in setup page

src/routes/+layout.server.ts

@@ -1,12 +1,15 @@
+import { goto } from "$app/navigation";
 import type { LayoutServerLoad, PageServerLoad } from "./$types";
 
 export const load: LayoutServerLoad = async (event) => {
   if (event.locals.user) {
     return {
       user: event.locals.user,
+      isServerSetup: event.locals.isServerSetup,
     };
   }
   return {
     user: null,
+    isServerSetup: event.locals.isServerSetup,
   };
 };