Ship color schemes with Oxygen

Summary: Because Oxygen color schemes are being removed in D21701, we now need to ship them with Oxygen.

Test Plan:
delete these color schemes if they are present in /usr/share/color-schemes/

compile

Reviewers: Plasma, VDG, ngraham

Reviewed By: VDG, ngraham

Subscribers: plasma-devel

Tags: Plasma

Maniphest Tasks: T10497

Differential Revision: https://phabricator.kde.org/D21702