feat(member): back the overview with a keyset-paginated :overview read action

lib/membership/membership.ex

@@ -45,6 +45,7 @@ defmodule Mv.Membership do
     resource Mv.Membership.Member do
       define :create_member, action: :create_member
       define :list_members, action: :read
+      define :overview_members, action: :overview
       define :update_member, action: :update_member
       define :destroy_member, action: :destroy
     end