Download generated cards as .MSE (magic set editor)

[forrestcoward]

Suggestion from user:

Magic set editor export would allow for easy playing of the cards using other programs as well as easy sharing and editing of these cards. Mse is used by a large majority of custom mtg and ai mtg fans/creators. It is open source I think as well. If you need info on creating mse files head over to the robo rosewater ai discord as their devs have clearly done a lot of work with it and are quite likely to share some code with you if you ask or need help. Their discord is called mtg neural net. The invite should be easy to find in various places like reddit or Twitter or any site that databases discord servers.

Add the ability to download generated cards in the .mse format.