feat: initial implementation of modern modular webshop (shop core)

shop/lib/utils.ts

@@ -0,0 +1,11 @@
+import { clsx, type ClassValue } from "clsx";
+import { twMerge } from "tailwind-merge";
+
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs));
+}
+
+// This check can be removed, it is just for tutorial purposes
+export const hasEnvVars =
+  process.env.NEXT_PUBLIC_SUPABASE_URL &&
+  process.env.NEXT_PUBLIC_SUPABASE_PUBLISHABLE_KEY;