Jellyseerr Support

[arvigeus]

Is your feature request related to a problem? Please describe.

Not a problem, but a convenience.

Describe the solution you'd like

nixarr.jellyseerr.enable = true;
# other networking options

Describe alternatives you've considered

Overseerr, but it's not as well integrated with Jellyfin.

Additional context

It's a popular addition to Jellyfin.