Proper packaging for linux [Flatpak/AppImage]

[Twig6943]

title.

[AminBhst]

I don't know if I can support AppImage since now brisk is shipped with an auto updater module and there is no way to make that work with AppImage. I'll see what I can do about flatpak.

[DaRandomCube]

Flatpak also doesn't support auto updater, but it's the better option due to better desktop integration

[AminBhst]

@DaRandomCube Yeah but at least with Flatpak you actually have the option to update the app yourself. I'm not a fan of AppImage because there is no way to make updating it a smoother process.