Alexander Lohnau authored Jul 20, 2023 and Albert Vaca Cintora committed Jul 22, 2023

This makes it easier to read, because we do not have to handle a list of
files that get added to the targets. In other KDE projects, we also
prefer the target centric approach.

In case one wants to reuse the same category in multiple places, it
would be best to create a small static lib. But for now, this is not
needed.