[FR] Support Overseerr

[JosefWN]

Is your feature request related to a problem? Please describe. Overseerr is a slick unified UI sitting on top of Sonarr and Radarr, tightly integrated with Plex. Sort of analogous to Jackett/Prowlarr but for media discovery and download rather than for configuration.

Describe the solution you'd like Add an Overseerr service: https://overseerr.dev/ There's a linuxserver image as well: https://hub.docker.com/r/linuxserver/overseerr

Describe alternatives you've considered Haven't seen any comparable alternatives.