Move all layouts to platters theme

themes/platters/layouts/partials/header.html

@@ -0,0 +1,28 @@
+{{- $currentPage := . -}}
+{{- $url := .RelPermalink -}}
+<header class="site">
+  <div class="platter grid">
+    <h1 class="site gradient">
+      <a class="site-name" href="{{ `` | absURL }}">{{ partial "site_name.html" site.Params.shortTitle }}</a>
+    </h1>
+    {{ partial "site_nav.html" . }}
+    <nav class="social">
+      {{ with site.Menus.social }}
+        {{- range . -}}
+          {{- $id := .Identifier -}}
+          {{- $targetBlank := .Params.targetBlank | default true -}}
+          <li id="social-menu-{{ $id }}">
+            <a
+              href="{{ .URL }}"
+              {{ if $targetBlank }}
+                target="_blank"
+              {{ end }}
+              aria-label="{{ .Name }}">
+              <img alt="{{ .Name }}" width=20 height=20>
+            </a>
+          </li>
+        {{- end -}}
+      {{ end }}
+    </nav>
+  </div>
+</header>