Print package information

[certik]

No description provided.

[certik]

@LKedward this prints package information, e.g.: https://github.com/fortran-lang/fpm-registry/pull/6/checks?check_run_id=899773507

Package: datetime
    Version: 1.7.0
        git: https://github.com/wavebitscientific/datetime-fortran
        tag: v1.7.0
    Version: latest
        git: https://github.com/wavebitscientific/datetime-fortran
Package: M_calculator
    Version: latest
        git: https://github.com/urbanjost/M_calculator
Package: M_change
    Version: latest
        git: https://github.com/urbanjost/M_change
...

So we can now take it and download the git repository for each case, extract fpm.toml and create some rich metadata JSON that we can then use at fortran-lang.org webpage.