vis from editors project

For openSUSE Tumbleweed run the following as root:

zypper addrepo https://download.opensuse.org/repositories/editors/openSUSE_Tumbleweed/editors.repo
zypper refresh
zypper install vis

For 15.6 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/editors/15.6/editors.repo
zypper refresh
zypper install vis

For 15.5 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/editors/15.5/editors.repo
zypper refresh
zypper install vis