Let users autoseed bittorrent downloads

[calumapplepie]

Some users, myself included, like too seed the files we download from bittorrent. It would be nice if kiwix could provide a UI to let us do this.

I know that this would require changes in the library package as well, and will be filing an issue there, too

[kelson42]

See https://github.com/kiwix/kiwix-lib/issues/424

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be now be reviewed manually. Thank you for your contributions.