add: ability to convert existing communities into forums

crates/app/src/public/html/communities/list.lisp

@@ -37,7 +37,7 @@
                     ("name" "is_forum")
                     ("class" "w_content"))
                 (span
-                    (text "Is forum")))
+                    (text "Make this a forum community")))
             (button
                 (text "{{ text \"communities:action.create\" }}"))))
     (text "{% if list|length >= 4 -%} {{ components::supporter_ad(body=\"Become a supporter to create up to 10 communities!\") }} {%- endif %} {%- endif %}")