Formulas: qvm-tags-in-pillar and qvm-features-in-pillar

[gonzalo-bulnes]

See #14

It turns out this can be done and works nicely. I'll add the formulas here, and eventually package them. This issue should help tracking progress while that happens.

Additional context on the Qubes OS forum

[gonzalo-bulnes]

Also: I don't really enjoy packaging, so if someone wants to have a go at setting up the .spec files once I merge #17, please feel free to let me know and I can give a hand! 🖐️

Don't get me wrong: I think it's an interesting exercise. Only not one that I find particularly fun to repeat once I've done it a few times. 🙂