Act as a Passkeys provider to iOS

[tladesignz]

cnh:

we need to figure out how to use the wrappers to become a passkey provider (to meet the pseudonymous use case)

https://developer.apple.com/documentation/authenticationservices
https://developer.apple.com/documentation/authenticationservices/ascredentialproviderextensioncontext
https://developer.apple.com/documentation/authenticationservices/aspasskeycredentialidentity
https://developer.apple.com/documentation/authenticationservices/asauthorizationplatformpublickeycredentialprovider

[tladesignz]

https://github.com/strongbox-password-safe/Strongbox
https://github.com/bitwarden/ios