archivers/arqiver: Update 0.9.0 → 0.12.0, flavorize qt, take maintainership
Changelogs:
https://github.com/tsujan/Arqiver/releases/tag/V0.10.0
https://github.com/tsujan/Arqiver/releases/tag/V0.11.0
https://github.com/tsujan/Arqiver/releases/tag/V0.12.0
Port changes:
- Add flavors qt5 and qt6: qt5 is default, qt6 is experimental
- Take maintainership
- Move to a better fit category
PR: 281171