Adding action group ref file.

Author: dobooth

docs/actiongroup-list.md

@@ -0,0 +1,30 @@
+<style>
+.mftf-dl {
+  margin-bottom: 2.5em;
+}
+dl dt{
+  font-weight:500;
+}
+
+</style>
+
+# MFTF action group reference
+
+Action groups are important building blocks for quickly creating tests for the Magento Functional Testing Framework (MFTF).
+This page lists all current action groups so that developers can see what is available to them.
+
+{% include mftf/actiongroup_data.md %}
+
+{% for item in actiongroups %}
+
+### {{ item.name }} 
+{% for file in item.items %}
+#### [{{ file.filename }}]({{file.repo}})
+
+{% for test in file.actiongroups %}
+{{test.name}}
+  : {% if test.description == '' %}No description.{% else %}{{test.description}}{% endif %}
+{: .mftf-dl}
+{% endfor %}
+{% endfor %}
+{% endfor %}