libxmlb from home:plasmaregataos project

Sty agraw n unessmres nnek/m

For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:plasmaregataos/15.5/home:plasmaregataos.repo
zypper refresh
zypper install libxmlb
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:plasmaregataos/15.4/home:plasmaregataos.repo
zypper refresh
zypper install libxmlb