feat: Add marketing and use case pages, their data structures, and supporting UI components.

src/app/(main)/(marketing)/dynamic-qr-code-generator/page.tsx

@@ -244,18 +244,18 @@ export default function DynamicQRCodeGeneratorPage() {
       description: featuredUseCases[0].summary,
       ctaLabel: featuredUseCases[0].ctaLabel,
     },
+    {
+      href: '/use-cases/payment-qr-codes',
+      title: 'Payment QR Codes',
+      description: 'Use one printed payment prompt that stays useful even when the checkout or provider path changes.',
+      ctaLabel: 'Create your payment QR code',
+    },
     {
       href: featuredUseCases[1].href,
       title: featuredUseCases[1].title,
       description: featuredUseCases[1].summary,
       ctaLabel: featuredUseCases[1].ctaLabel,
     },
-    {
-      href: featuredUseCases[2].href,
-      title: featuredUseCases[2].title,
-      description: featuredUseCases[2].summary,
-      ctaLabel: featuredUseCases[2].ctaLabel,
-    },
     {
       href: '/use-cases',
       title: 'Explore the use-case hub',