helvum from home:etamPL project

For openSUSE Tumbleweed run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:etamPL/openSUSE_Tumbleweed/home:etamPL.repo
zypper refresh
zypper install helvum

For 15.6 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:etamPL/15.6/home:etamPL.repo
zypper refresh
zypper install helvum