feat: Add social metadata for LD+JSON

layouts/partials/social_metadata.html

@@ -57,3 +57,13 @@
     {{ else }}
     <meta name="keywords" content="{{ $.Site.Params.Keywords }}" />
     {{ end }}
+
+    <script type="application/ld+json">
+    {
+      "@context": "http://schema.org/",
+      "@type": "WebSite",
+      "name": "{{ default .site.Title .Title }}",
+      "image": "{{ .Site.Params.SocialImage }}",
+      "about": "{{ $.Site.Params.description }}"
+    }
+    </script>