Add helper file for the custom IAEA Topics template

ckanext/iaea/templates/group/snippets/helper.html

@@ -0,0 +1,14 @@
+<div class="module module-narrow module-shallow">
+  <h2 class="module-heading">
+    <i class="fa fa-info-circle"></i>
+    {{ _('What are Topics?') }}
+  </h2>
+  <div class="module-content">
+    <p>
+      {% trans %} You can use CKAN Topics to create and manage collections of
+      datasets. This could be to catalogue datasets for a particular project or
+      team, or on a particular theme, or as a very simple way to help people
+      find and search your own published datasets. {% endtrans %}
+    </p>
+  </div>
+</div>