Sign in with a passkey through form autofill

[truongnmt]

Why

Sign in with a passkey through form autofill. Make the transition from password to passkey-based authentication easier.

Ref:

• https://web.dev/passkey-form-autofill/
• https://developers.google.com/codelabs/passkey-form-autofill

What

• use Conditional UI to include passkeys in autofill suggestions
• load credential options on page load