feat(frontend): add react spa with wishlist flows and public profile

apps/frontend/src/lib/cn.ts

@@ -0,0 +1,6 @@
+import clsx, { type ClassValue } from 'clsx';
+import { twMerge } from 'tailwind-merge';
+
+export function cn(...inputs: ClassValue[]): string {
+  return twMerge(clsx(inputs));
+}