[FEATURE] USB smartcard support

[e6e7e8f4g2]

Is your feature request related to a problem? Please describe.

I'd like to be able to use this app from a dumbphone which does not include NFC capabilities.

Describe the solution you'd like

Option to import and use GPG key on a smartcard over USB transport.

Describe alternatives you've considered

OpenKeychain + old version of Password Store.

Additional context

No response

[dummys]

hello, I tested your fork and so fare everything works. Would be perfect if you can add USB support with NFC, because sometimes its better to use USB.

[valasiadis]

Sorry for the late reply. I'm am planning to implement this, I'm just a little short on time right now. I want to complete some things before that, but I think it'll be done in the next couple weeks at the latest :)