shells-cli from home:louis94_m:freeciv21 project

对于 openSUSE Tumbleweed，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/home:louis94_m:freeciv21/openSUSE_Tumbleweed/home:louis94_m:freeciv21.repo
zypper refresh
zypper install shells-cli