LG-11867: Create separate user events for platform authenticators

[aduth]

🎫 Ticket

LG-11867

🛠 Summary of changes

Adds new user event types for Face or Touch Unlock platform authenticators.

The implementation of Face or Touch Unlock built upon support for WebAuthn-based security keys. In the implementation of Face or Touch Unlock, the user experience was segmented based on whether or not the authenticator is a platform authenticator. However, prior to these changes, that did not extend to the user events created for adding an removing the authentication method. As a result, adding or removing Face or Touch Unlock would be reflected on a user's Activity page as "Hardware security key added" and "Hardware security key removed". The intent of these changes is to add new event types so that a more appropriate / familiar "Face or touch unlock added" and "Face or touch unlock removed" label can be shown instead.

📜 Testing Plan

1. Go to http://localhost:3000
2. Sign in
3. From your account dashboard, add and/or remove a Security Key and/or a Face or Touch Unlock credential
4. After changing your MFA methods, visit the "History" page on the account dashboard
5. Verify that the label shown under "Activity" matches the expectation of the action you performed:
   • Adding security key = "Hardware security key added"
   • Removing security key = "Hardware security key removed"
   • Adding face or touch unlock = "Face or touch unlock added"
   • Removing face or touch unlock = "Face or touch unlock removed"

👀 Screenshots

Language	Screenshot
English
Spanish
French
Chinese

[kevinsmaster5]

Looks good and local testing works.
Do PRs still need screenshots of the translations for LQA?

[aduth]

Do PRs still need screenshots of the translations for LQA?

I should have clarified in a comment, but: The strings in the current branch are meant to be temporary. There's a follow-up ticket LG-11867 which will implement the final translations, and we'll want to go through the LQA process for that ticket.

Related Slack thread: https://gsa-tts.slack.com/archives/C05R6BLVAQG/p1738249868960499

[aduth]

But I'll update the original pull request comment with screenshots showing each language as it is, since that'd be helpful to share regardless of LQA. Good call-out 👍

Edit: Updated screenshots in original comment.

[aduth]

Pushed rebase reflecting latest main, after merge of changes in #11833 which were deployed in RC 449.