feat: add cart and product pages, quantity controls, and first-visit development notice

app/cart/page.tsx

@@ -0,0 +1,8 @@
+import type {Metadata} from 'next';
+import CartPage from '@/components/CartPage';
+
+export const metadata: Metadata = {title: 'سبد خرید | روبات مارکت'};
+
+export default function Page() {
+    return <CartPage/>;
+}