Adjust KCM for KF6
We no longer use kpackage to install the QML files and use classes/QML files from kcmutils instead of KDeclarative Also, remove some unused inclused that allow us to remove the KPackage dependency entirely.
We no longer use kpackage to install the QML files and use classes/QML files from kcmutils instead of KDeclarative Also, remove some unused inclused that allow us to remove the KPackage dependency entirely.