python-pyproject-api from home:ecsos:python project

For 15.6 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:ecsos:python/15.6/home:ecsos:python.repo
zypper refresh
zypper install python-pyproject-api

For 15.5 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:ecsos:python/15.5/home:ecsos:python.repo
zypper refresh
zypper install python-pyproject-api

For 16.0 run the following as root:

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