Split schema to a separate include file (mmistakes#3085)

* Make changes to schema easier

* Only show on one page not on all pages

* Move schema.html to _includes/ and move the URL guard out

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Co-authored-by: iBug <[email protected]>

Author: lsolesen

_includes/schema.html

@@ -0,0 +1,16 @@
+<script type="application/ld+json">
+    {
+      "@context": "https://schema.org",
+      {% if site.social.type == "Organization" %}
+        "@type": "Organization",
+        "url": {{ '/' | absolute_url | jsonify }}{% if site.og_image %},
+        "logo": {{ site_og_image | jsonify }}{% endif %}{% if site.social.links %},
+        "sameAs": {{ site.social.links | jsonify }}{% endif %}
+      {% else %}
+        "@type": "Person",
+        "name": {{ site.social.name | default: site.name | jsonify }},
+        "url": {{ '/' | absolute_url | jsonify }}{% if site.social.links %},
+        "sameAs": {{ site.social.links | jsonify }}{% endif %}
+      {% endif %}
+    }
+</script>

_includes/seo.html

@@ -121,21 +121,9 @@
   <link rel="next" href="{{ paginator.next_page_path | absolute_url }}">
 {% endif %}
 
-<script type="application/ld+json">
-  {
-    "@context": "https://schema.org",
-    {% if site.social.type == "Organization" %}
-      "@type": "Organization",
-      "url": {{ '/' | absolute_url | jsonify }}{% if site.og_image %},
-      "logo": {{ site_og_image | jsonify }}{% endif %}
-    {% else %}
-      "@type": "Person",
-      "name": {{ site.social.name | default: site.name | jsonify }},
-      "url": {{ '/' | absolute_url |jsonify }}{% if site.social.links %},
-      "sameAs": {{ site.social.links | jsonify }}{% endif %}
-    {% endif %}
-  }
-</script>
+{% if page.url == '/' %}
+  {% include schema.html %}
+{% endif %}
 
 {% if site.google_site_verification %}
   <meta name="google-site-verification" content="{{ site.google_site_verification }}" />