docs(website): add JSON-LD structured data + complete OG/Twitter tags

The landing page had good basic meta but no structured data. Add:

- JSON-LD: Organization (btravstack, with sameAs GitHub + npm and logo),
  WebSite, and an ItemList of the three packages (each a SoftwareApplication)
  — helps Google build the entity, show the site name/logo, and understand
  the hub → packages relationship.
- Round out Open Graph (site_name, locale, image type/width/height/alt) and
  Twitter (explicit title/description, image alt), plus author/robots/keywords.

Verified: build renders all three JSON-LD blocks and the full tag set.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: btravers

apps/website/.vitepress/config.ts

@@ -20,13 +20,121 @@ export default defineConfig({
     ["meta", { name: "google-site-verification", content: "u6ZPW5bWbP9G1yF5Sv7B4fSOJm5rLbZWeH858tmisTc" }],
     ["link", { rel: "icon", type: "image/svg+xml", href: "/favicon.svg" }],
     ["link", { rel: "apple-touch-icon", sizes: "180x180", href: "/apple-touch-icon.png" }],
+    ["meta", { name: "author", content: "Benoit Travers" }],
+    ["meta", { name: "robots", content: "index, follow" }],
+    [
+      "meta",
+      {
+        name: "keywords",
+        content:
+          "TypeScript, backend, Node.js, type-safe, contracts, AMQP, RabbitMQ, Temporal, workflows, errors as values, Result, schema validation, amqp-contract, temporal-contract, unthrown",
+      },
+    ],
+
+    // Open Graph
     ["meta", { property: "og:type", content: "website" }],
+    ["meta", { property: "og:site_name", content: SITE_TITLE }],
+    ["meta", { property: "og:locale", content: "en_US" }],
     ["meta", { property: "og:title", content: `${SITE_TITLE} — an expressive, robust TypeScript backend` }],
     ["meta", { property: "og:description", content: SITE_DESCRIPTION }],
     ["meta", { property: "og:url", content: `${SITE_URL}/` }],
     ["meta", { property: "og:image", content: `${SITE_URL}/og-btravstack.png` }],
+    ["meta", { property: "og:image:type", content: "image/png" }],
+    ["meta", { property: "og:image:width", content: "1280" }],
+    ["meta", { property: "og:image:height", content: "640" }],
+    [
+      "meta",
+      {
+        property: "og:image:alt",
+        content: "btravstack — type-safe building blocks for the TypeScript backend",
+      },
+    ],
+
+    // Twitter Card
     ["meta", { name: "twitter:card", content: "summary_large_image" }],
+    ["meta", { name: "twitter:title", content: `${SITE_TITLE} — an expressive, robust TypeScript backend` }],
+    ["meta", { name: "twitter:description", content: SITE_DESCRIPTION }],
     ["meta", { name: "twitter:image", content: `${SITE_URL}/og-btravstack.png` }],
+    [
+      "meta",
+      {
+        name: "twitter:image:alt",
+        content: "btravstack — type-safe building blocks for the TypeScript backend",
+      },
+    ],
+
+    // JSON-LD: the org, the site, and the three packages it publishes
+    [
+      "script",
+      { type: "application/ld+json" },
+      JSON.stringify({
+        "@context": "https://schema.org",
+        "@type": "Organization",
+        name: SITE_TITLE,
+        url: `${SITE_URL}/`,
+        logo: { "@type": "ImageObject", url: `${SITE_URL}/logos/btravstack-dark.svg` },
+        description: SITE_DESCRIPTION,
+        sameAs: ["https://github.com/btravstack", "https://www.npmjs.com/~btravers"],
+      }),
+    ],
+    [
+      "script",
+      { type: "application/ld+json" },
+      JSON.stringify({
+        "@context": "https://schema.org",
+        "@type": "WebSite",
+        name: SITE_TITLE,
+        url: `${SITE_URL}/`,
+        description: SITE_DESCRIPTION,
+      }),
+    ],
+    [
+      "script",
+      { type: "application/ld+json" },
+      JSON.stringify({
+        "@context": "https://schema.org",
+        "@type": "ItemList",
+        name: "btravstack packages",
+        itemListElement: [
+          {
+            "@type": "ListItem",
+            position: 1,
+            item: {
+              "@type": "SoftwareApplication",
+              name: "amqp-contract",
+              applicationCategory: "DeveloperApplication",
+              operatingSystem: "Cross-platform",
+              url: "https://btravstack.github.io/amqp-contract/",
+              description: "Type-safe contracts for AMQP & RabbitMQ.",
+            },
+          },
+          {
+            "@type": "ListItem",
+            position: 2,
+            item: {
+              "@type": "SoftwareApplication",
+              name: "temporal-contract",
+              applicationCategory: "DeveloperApplication",
+              operatingSystem: "Cross-platform",
+              url: "https://btravstack.github.io/temporal-contract/",
+              description: "Type-safe contracts for Temporal.io.",
+            },
+          },
+          {
+            "@type": "ListItem",
+            position: 3,
+            item: {
+              "@type": "SoftwareApplication",
+              name: "unthrown",
+              applicationCategory: "DeveloperApplication",
+              operatingSystem: "Cross-platform",
+              url: "https://btravstack.github.io/unthrown/",
+              description: "Explicit errors as values, for TypeScript.",
+            },
+          },
+        ],
+      }),
+    ],
   ],
 
   themeConfig: {