feat: support for restricting II auth methods

[krpeacock]

Description

Adds new security features from the II login flow for restricting authentication types: https://github.com/dfinity/internet-identity/blob/6c345912457ca93bf3175ce3382a1ddf8ff46eca/docs/ii-spec.md#client-authentication-protocol

New Login method allows developers to restrict users from authenticating using a PIN

Also allows onSuccess to pass through the message from the IDP provider, allowing developers to access the new authnMethod field

Fixes # (issue)

How Has This Been Tested?

Tested manually after building and installing in https://github.com/krpeacock/auth-client-demo

Checklist:

• My changes follow the guidelines in CONTRIBUTING.md.
• The title of this PR complies with Conventional Commits.
• I have edited the CHANGELOG accordingly.
• I have made corresponding changes to the documentation.

[github-actions]

size-limit report 📦

Path	Size
@dfinity/agent	101.81 KB (0%)
@dfinity/candid	13.61 KB (0%)
@dfinity/principal	5.04 KB (0%)
@dfinity/auth-client	92.77 KB (+0.02% 🔺)
@dfinity/assets	93.43 KB (0%)
@dfinity/identity	89.98 KB (0%)
@dfinity/identity-secp256k1	281.19 KB (0%)

[nmattia]

Looking great, thanks! Have you tried it out? I think the feature's live in II already

[krpeacock]

Looking great, thanks! Have you tried it out? I think the feature's live in II already

Yep - the screenshot was from mainnet