level-zero from home:cmcantalupo 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:cmcantalupo/openSUSE_Tumbleweed/home:cmcantalupo.repo
zypper refresh
zypper install level-zero

对于 15.6，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/home:cmcantalupo/15.6/home:cmcantalupo.repo
zypper refresh
zypper install level-zero

对于 15.5，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/home:cmcantalupo/15.5/home:cmcantalupo.repo
zypper refresh
zypper install level-zero

对于 15.4，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/home:cmcantalupo/15.4/home:cmcantalupo.repo
zypper refresh
zypper install level-zero

对于 15.4-levelzero，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/home:cmcantalupo/15.4-levelzero/home:cmcantalupo.repo
zypper refresh
zypper install level-zero