xboard from home:rjmathar project

For Fedora 41 run the following as root:

dnf config-manager addrepo --from-repofile=https://download.opensuse.org/repositories/home:rjmathar/Fedora_41/home:rjmathar.repo
dnf install xboard

For Fedora 40 run the following as root:

dnf config-manager --add-repo https://download.opensuse.org/repositories/home:rjmathar/Fedora_40/home:rjmathar.repo
dnf install xboard

For openSUSE Tumbleweed run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:rjmathar/openSUSE_Tumbleweed/home:rjmathar.repo
zypper refresh
zypper install xboard

For 15.6 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:rjmathar/15.6/home:rjmathar.repo
zypper refresh
zypper install xboard

For 15.5 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:rjmathar/15.5/home:rjmathar.repo
zypper refresh
zypper install xboard

For 15.4 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:rjmathar/15.4/home:rjmathar.repo
zypper refresh
zypper install xboard