[timebox] Update the AUR package for Arch Linux users

There is on old AUR snapshot, python2-nuxeo-drive, originally maintained by Pierre-Gildas Millon. Since Drive is using a more up-to-date stack, we could create a new package: python3-nuxeo-drive or nuxeo-drive.

There will be issues to tackle first:

• Are we going to use the AppImage? It may be simpler, but need testing. Also what about auto-updates?
• If we just reuse the old package and update requirements, not everything will work as we have a notion of "frozen app". And some features/behaviors are controled by that state.