Add linux pc/phone support

[Haui1112]

Is your feature request related to a problem? Please describe.
This app is awesome on ios and if selfhosted. But youre out of luck on linux rn. .

Describe the solution you'd like
packaging the web version with web server into a flatpak should be doable

Describe alternatives you've considered
Another way would be to completely rewrite a client but that seems foolish

Additional context
linux phones with postmarketos are computers with tiny screens and any app that uses adaptable graphics is ready for postmarketos. voyager would bring a huge capability with lemmy same as others do with mastoson.