feat: support for multiple search providers (nyaa.si!)

[micielski]

TODO:

• [x] Better error handling
• [x] Make providers configurable (on/off)
• [x] Popup for provider statuses
• [x] Split search tab into multiple files
• [x] Handle the case when there are no results in Nyaa
• [x] Release new version of Magnetease (this will fix CI)

[micielski]

This is what I mean by providers popup:

[micielski]

Seems to be finished