Move all files to zet-old/

zet-old/source/_layouts/zet.html.twig

@@ -0,0 +1,25 @@
+{% extends "base" %}
+
+{% block body %}
+  <nav>
+    <a href="/">Home</a>
+  </nav>
+
+  {{ parent() }}
+{% endblock %}
+
+{% block content_wrapper %}
+  <time datetime="{{ page.date|date('c') }}">{{ page.date|date }}</time>
+
+  {% block content %}{% endblock %}
+
+  {% include "zets/links" with { links: page.links } %}
+
+  {% include "zets/related" with {
+    zets: data.zets,
+    related: page.related,
+  } %}
+
+{% include "zets/tags" with { tags: page.tags } %}
+
+{% endblock %}