Authentication via FIDO/Passkeys#579

In 2023, Kirby should support modern, secure authentication out-of-the-box: that is TOTP which can be setup via QR-Codes (way more secure than e-mail OTP), FIDO and Passkeys.

i think @distantnative just teased this in discord for Kirby4 yesterday: https://discord.com/channels/525634039965679616/1111220342522904706/1153758543367897109

🎉

Yeah yeah das wäre sehr genial!

I hope this feature request gets more attention. Native Passkey authentication would be super cool!