Prowlarr backend support

[agneevX]

Prowlarr (https://github.com/Prowlarr/Prowlarr) is good alternative to Jackett.

[hauxir]

What does it offer that Jackett doesn't?

[agneevX]

Well a better UI and stats for starters.

[YukiRainee]

sorry to necro this here but currently jackett is pretty much equal to prowlarr in my experience and has better integration with *arrs stuff which is what I already have setup on my homelab so being able to use rapidbay without needing to setup jackett and keep it synced with all the indexers I have on prowlarr would be very much appreciated

[mrtargaryen]

prowlarr integration would actually be great, I don't want to run both prowlarr and jackett