docs: add JSON-LD schemas to docs (#14007)

www/apps/cloud/app/layout.tsx

@@ -15,8 +15,7 @@ export const metadata: Metadata = {
     template: `%s - ${config.titleSuffix}`,
     default: config.titleSuffix || "",
   },
-  description:
-    "Learn about Cloud, Medusa's PaaS offering for scalable deployments.",
+  description: config.description,
   metadataBase: new URL(
     process.env.NEXT_PUBLIC_BASE_URL || "http://localhost:3000"
   ),