Use Nitrokey Python SDK

[robin-nitrokey]

This patch replaces the pynitrokey dependency with the Nitrokey Python SDK. For FIDO2 interactions, the fido2 library can be used directly. Retries is so simple that it can be copied from pynitrokey.

[daringer]

looks good with nitrokey-sdk v0.2rc1 - waiting for this to release, then follow with this PR

[mmerklinger]

Linux (Fedora 40, Python 3.9)

	NRF52	LPC55
Update	Ok	Ok
Add passwords	Ok	Ok
Change PINs	Doesn't work. Gives weird messages about PIN requirement.	Doesn't work. Gives weird messages about PIN requirement.
Reset Apps	Passwords work. Fido2 reset is stuck in a reset loop until the 10 seconds timeout.	Passwords work. Fido2 reset is stuck in a reset loop until the 10 seconds timeout, but it seems to work.

[mmerklinger]

Windows (10 Professional, Python 3.11.9)

	NRF52	LPC55
Update	Ok	Ok
Add passwords	Ok	Ok
Change PINs	Doesn't work. Gives weird messages about PIN requirement.	Doesn't work. Gives weird messages about PIN requirement.
Reset Apps	Passwords work. Fido2 reset is stuck in a reset loop until the 10 seconds timeout.	Passwords work. Fido2 is stuck in a reset loop until the 10 seconds timeout, but it seems to work.

[mmerklinger]

I think the issues above with the PIN setting I saw before mentioned by a user, so probably a different bug and has nothing to do with this specific branch.

[daringer]

okok, I guess this is good news, reset + pin needs further work anyways and shouldn't block this - nice!