Add users KCM
Summary:
This patch introduces a new users KCM based off of the AccountsService.
Co-authored-by: Nicolas Fella <nicolas.fella@gmx.de>
Closes T7246
Test Plan:
Reviewers: Plasma, VDG, ngraham
Reviewed By: VDG, ngraham
Subscribers: ltoscano, mart, yurchor, iasensio, meven, crossi, The-Feren-OS-Dev, davidedmundson, broulik, filipf, ngraham, nicolasfella, zzag, plasma-devel
Tags: Plasma
Maniphest Tasks: T7246
Differential Revision: https://phabricator.kde.org/D28154