Add support to specify the search term for a tv show

Nefarious monitor the availability of new episodes for the TV shows and this is awesome feature ❤️
The problem is sometimes that in non-English tackers, sometimes the uploaders names the torrents with the Spanish translation and other with the English name. In these cases, it'd be nice if I can override the search term for this specific tv show.

An example, The Legend of Vox Machina is translated into La leyenda de Vox Machina. Nefarious try to look for La leyenda de Vox Machina but the uploader uploaded all the show using the original name instead of the translated name. For movies this is not a problem because I go manually and select the torrent, but in tv shows, this means that I have to add all the torrents one by one, and I lose also the capability of automatic tracking for new episodes.

Thanks for this awesome tool! ❤️ ❤️ ❤️ ❤️

Start by tracing the TV-show search flow and how a show's title is stored and presented. Add a per-show search-term override that automatic episode tracking uses, while preserving the existing title as the default; the issue is done when translated and original torrent names can both be tracked automatically.