Add a commandline tool to switch lnf package
Summary:
using the kcm c++ itself to do the switch, have a tool
that can be used to switch lnf package from the command line
Test Plan: running the tool has the same effect of chosing a lnf trough the kcm
Reviewers: Plasma, davidedmundson
Reviewed By: Plasma, davidedmundson
Subscribers: davidedmundson, plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D9411