Expose qBittorrent's category filter in Flood

[pcroland]

Discussed in #666

^{Originally posted by pcroland August 12, 2023}
So the thing is, I can't add an RSS autodownload from Flood that moves the files to another folder after completion. Issue about it: url

That's why I had to setup RSS in qBittorrent's WebUI, but unlike Flood that doesn't let me assign tags for it, only category assignent, but Flood doesn't let me filter category, only tags.

[henriquevcosta]

Sorry if I'm adding scope to your request.
It's not just the category filter that's needed, it's support for the concept of qbittorrent's categories throughout Flood - categories are a very relevant piece of the puzzle when using with the *arr services so it'd be great to have support for categories in adding torrents too.

[trim21]

Pull request welcome