Add JSON output format to list command

[tmspzz]

Enhancement Suggestion

Add the possibility to output the results of the list command as JSON

Steps which explain the enhancement

1. Add an optional argument to list (perhaps --print-format=JSON)
2. Devise a JSON representation for list command output

Current and suggested behavior

Currently the only output format is a custom text representation

Why would the enhancement be useful to most users

This enhancement would allow for more flexibility when integrating Rome into other workflows

[pt2121]

hey @blender, I'll give this a shot.

[tmspzz]

Thanks @pt2121 ! Good luck!

[tmspzz]

@pt2121 Thanks again! Do you use Rome or just wanted to contribute to some hacktoberfest Haskell project?

[pt2121]

@blender i'm doing hacktoberfest and learning Haskell. Thanks for the beginner label. Super helpful!