add theme.toml, archetypes, layouts, and css

layouts/_default/terms.html

@@ -0,0 +1,16 @@
+{{ partial "header.html" . }}
+
+<h1>{{ .Title }}</h1>
+
+<ul class="terms">
+  {{ range $key, $value := .Data.Terms }}
+  <li>
+    <a href="{{ (print "/" $.Data.Plural "/" ($key | urlize)) | relURL }}">
+      {{ $key }}
+    </a>
+    ({{ len $value }})
+  </li>
+  {{ end }}
+</ul>
+
+{{ partial "footer.html" . }}