Is your feature request related to a problem? Please describe.
This is not related to a bug.

Describe the solution you'd like
I don't run Ubuntu, and I'd like to avoid installing snapd. Would it be possible to bundle JRPN as an official flatpak as well?

Describe any alternatives you've considered
There seem to be several "wrapped application" solutions out there. Snapd is mostly bound to Ubuntu, while Flatpak appears to be more universally available across distributions.

Additional context
I know it's extra work, but it would make JRPN more widely available. Thank you!