Add footprint libraries

Created by: aimylios

The nightly builds from KiCad's Copr repository currently do not include any footprints. Unless there is a good reason for this I would propose to include all footprints from the new kicad-footprints repository.

This change should be fairly safe, as current users of the nightlies do not rely on footprints being packaged as part of the KiCad RPM. The logical next step would be to also package the new 3D packages, templates and symbols, but this is more risky because of the incompatibility to the currently used kicad-library repo.

In the long run, having separate packages for symbols, footprints, templates, 3D packages and documentation (similar to what has been proposed for Debian) is the way to go. But I don't know what the KiCad upstream maintainers plans are, and the nightly builds should be kept in sync with upstream to simplify switching between repositories.