user groups listing template

- creates groups/user_groups template for listing a user's groups on their user page

bookwyrm/templates/user/groups.html

@@ -34,7 +34,7 @@
         {% include 'groups/form.html' %}
     </form>
 
-    {% include 'groups/group_items.html' with groups=groups %}
+    {% include 'groups/user_groups.html' with groups=groups %}
 </section>
 <div>
     {% include 'snippets/pagination.html' with page=user_groups path=path %}