Ability to create additional listing packages in the directory plugin

It would be cool if the directory plugin had the capability to create additional listing packages.

This is similar to what ilanabit requested here https://premium.wpmudev.org/forums/topic/free-and-paid-listings#post-359973 – but goes a little beyond that.

E.g create packages called basic, silver and platinum with different pricing that allow for additional content, pics and fields.

This would entice directory users to more readily sign up for the cheaper packages and then perhaps upgrade later.

Other applications (directorypress, classipress) have this and wpmudev should so too!