Move all layouts to platters theme

themes/platters/layouts/partials/single_main.html

@@ -0,0 +1,29 @@
+{{ partial "content_header.html" . }}
+
+{{ partial "table_of_contents.html" . }}
+
+{{- $layout := .Params.layout -}}
+{{- $content := .Content -}}
+{{ with $layout := .Params.layout }}
+  <article class="{{ $layout }}">
+    {{ $content }}
+  </article>
+{{ else }}
+  {{ $content }}
+{{ end}}
+
+<footer>
+  {{ partial "footer_tags.html" . }}
+
+  {{ $pages := where site.RegularPages "Type" "in" site.Params.mainSections }}
+  {{- if and (gt (len $pages) 1) (in $pages . ) -}}
+    <nav class="post-nav">
+      {{ with $pages.Prev . }}
+        <a class="prev" href="{{ .Permalink }}"><span>←</span><span>{{ .Name }}</span></a>
+      {{ end }}
+      {{ with $pages.Next . }}
+        <a class="next" href="{{ .Permalink }}"><span>{{ .Name }}</span><span>→</span></a>
+      {{ end }}
+    </nav>
+  {{- end -}}
+</footer>