add csv-table shortcode

layouts/shortcodes/csv-table.html

+{{ $caption := .Get "caption" }}
+{{ $useHeaderRow := .Get "header" }}
+{{ $rows := .Inner | transform.Unmarshal }}
+
+
+
+<div class="custom-table-1" >
+<table class="sortable">
+  {{ with $caption }}<caption>{{ . }}</caption>{{ end }}
+  {{ if $useHeaderRow }}
+    {{ $headerRow := index $rows 0 }}
+    {{ $rows = after 1 $rows }}
+    <thead><tr> {{ range $headerRow }} <th>{{ . }}</th> {{ end }} </tr></thead>
+  {{ end }}
+  {{ range $rows }}
+    <tr>
+      {{ range . }}
+        {{ if (findRE "^\\d+$" .) }}
+          <td class="numeric">{{ . }}</td>
+        {{ else }}
+          <td>{{ . }}</td>
+        {{ end }}
+      {{ end }}
+    </tr>
+  {{ end }}
+</table>
+</div>
+
+