mono-complete from home:zkrd2:mono project

For 15.4 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:zkrd2:mono/15.4/home:zkrd2:mono.repo
zypper refresh
zypper install mono-complete

For 15.3 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:zkrd2:mono/15.3/home:zkrd2:mono.repo
zypper refresh
zypper install mono-complete

For SLE 15 SP2 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:zkrd2:mono/SLE_15_SP2/home:zkrd2:mono.repo
zypper refresh
zypper install mono-complete