Integrate German media libraries (ARD & ZDF Mediathek) in Prowlarr, Sonarr and Radarr.
I'm not sure if it is worthwhile to
1. create a dedicated user (it only makes sense to run it as the same user as Radarr/Sonarr)
2. create data directories (paths in `files/mediathekarr.json.sample` are taken from upstream examples). For a functional setup they need match the paths of Radarr/Sonarr, which are configured via a web interface at startup.
- `portlint -AC`
- `portclippy --strict`
- `poudriere` test runs