Sand - Torrent Downloader

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- Added feature that allows users to download torrents.
- Added auto-pause feature when downloads are complete.
- Updated external magnet link click to give users a choice to either download or stream torrents.
- Added DuckDuckGo search that allows users to search torrents in an external browser.
- Added Discord to the socials.
- Added 'Don't ask again' checkbox to migration confirmation dialog.