[FEATURE REQUEST] Add interface for qbittorrent search

[Einliterflasche]

Is your feature request related to a problem? Please describe.
I am annoyed when I have to sift through many websites to get a torrent link I can then paste into qBittorrent.

Describe the solution you'd like
The official client implements a search api which allows searching through specific trackers (?) which streamlines the process immensely.

This app could provide a UI for interfacing with this api to allow the easy addition of torrents without leaving the app.

Additional context
I'd like to try my hand at implementing this feature.

[Einliterflasche]

I now realize this requires raising the api target verison from 2.8.x (?) to 4.2.0, since the search api was introduced only then. Alternatively we could preserve backwards compatibility by locking this features so that it is only accessable on servers >= 4.2.0.