refactor templates layout

@see https://gohugo.io/templates/new-templatesystem-overview/

layouts/_partials/single/post-meta/locations.html

@@ -0,0 +1,23 @@
+{{- /*
+  Displays the locations for an item.
+
+  @params locations The locations or the item.
+  */
+-}}
+
+
+<section
+  id="post-locations"
+  class="article-footer__locations"
+>
+  <h3>Locations</h3>
+  <div
+    id="map"
+    style="width: 100%; height: 500px; margin: 0; display: block;"
+  ></div>
+  <ul style="display: none">
+    {{- range .locations.ByTitle -}}
+      <li class="p-location"><a href="{{ .RelPermalink }}">{{ .LinkTitle | safeHTML }}</a></li>
+    {{- end -}}
+  </ul>
+</section>