add option to configure HSM for use with GnuPG

[eighthave]

It is possible to use the keys in a NitroKey HSM with GnuPG as PGP keys. Most of this configuration is in GnuPG itself, but the card also needs some configuration. I see this functionality as a) doing the card configuration, and b) checking to make sure GnuPG is configured to handle it (basically reading some config files, and checking gpg --card-status programmatically). Here's a HOWTO:
https://stafwag.github.io/blog/blog/2020/05/02/using-smartcardhsm-with-gpg/

Excuse me if this is out of the scope you intended for this project, I see it as a place to gather all the various possible configurations with these cards.