Ability to claim device via a unique code

[nullr0ute]

In a lot of cases IoT devices won't appear on the same network/IP as the person logged into the management UX.

The ability to provide a unique generated ID on the display/console that a user can enter into the management UX to claim the device would be useful.

It might be useful to make this expandable to add different/multiple means of providing the ability to do this different ways. QCode and NFC via an app are other ideas that come to mind.

[puiterwijk]

This would depend on #49, so we can get that info sent to the Zezere server.

[nullr0ute]

This will be re-envisioned when we have FIDO FDO integration