addTorrent
suspend fun addTorrent(torrent: TorrentInfo, disk: DiskIo, resume: AddTorrentParams? = null): TorrentSession
Add a torrent and begin downloading it. Announces to trackers immediately. When the DHT is running it also starts a get_peers lookup and feeds those results in.
Pass resume (from TorrentSession.saveResumeData / ResumeData.read) to restore a previous run's progress without re-hashing the data on disk. This is the fast-resume path.