Flatpak support

[waffles-dev]

Is there anything blocking this from being able to run in a Flatpak? Is this something on the radar?

Universal Blue and its downstreams (e.g. Bazzite) could be dropping AppImage support in the future due to security vulnerabilities in FUSE libs and other issues.

I'm happy to move to building from source, but I have friends using these distros who aren't super tech savvy. I'd love to see this app on Flathub.

I'm not sure if I'll have anything to contribute to this, but if you let me know what you need done to get it there I can give it a look.

[bpozdena]

Sorry, AppImage is the only package I'm willing to maintain myself for now.