Provide non-flatpak builds

[AppleSheeple]

Flatpak builds are annoying for those of us who don't want to use them.

I tried verso a couple of times by extracting files from flatpak using ostree. But the fact that this is required is kind of silly. And I'm not going to do it again, since I have no intention of keeping these packages installed in my system.

I'd imagine there are others who didn't low-effort test verso for the same reason.

The files are there in the CI workflow. Uploading them in non-flatpak form too would be immensely helpful.