Current problems with baloos config and open subtask:
[ ] Investigate why `balooctl config add` still writes `~/.config/baloorc` and not only `baloofilerc`. See also T1562
[ ] Deduplicate logic from [[ https://cgit.kde.org/plasma-desktop.git/tree/kcms/baloo | Baloo KCM ]] and [[ https://cgit.kde.org/baloo.git/tree/src/tools/balooctl/configcommand.cpp | balooctl ]]