Add new western sky cultur
Summary: See: https://sternenkarten.com/2019/12/27/kstars-clines/
Test Plan:
Start kstars
Settings - Setup kstars - Guides:
Enable constellation lines
Switch to sky culture Western (sternenkarten.com)
Enable constellation names
Look, if the clines and cnames are shown properly in kstars
Reviewers: mutlaqja
Reviewed By: mutlaqja
Subscribers: kde-edu
Tags: KDE Edu
Differential Revision: https://phabricator.kde.org/D26247