Release 8.0

[davidmhewitt]

trafficstars

Probably should have added the release tag in #147 because the 8.0 runtime is building in the daily branch now but an 8.0 Flatpak branch won't be created and pushed until we run the release action.

Edit: Not sure if there are stylesheet or icon releases we want to get in first, or if they'd come in a later release.

[danirabbit]

Ah yeah don't want to release it yet until the other stuff is released