* Fix broken security key 2FA on mobile login.hbs
* Show nicer error message when a security key already exists
* [COPY] Disable -> Delete for security key editing
* Standardize UI elements in 2FA prefs password confirmation
* Minor fixes to label location for resetPasswordProgress
Adds 2 factor authentication method via second factor security keys over [web authn](https://developer.mozilla.org/en-US/docs/Web/API/Web_Authentication_API).
Allows a user to authenticate a second factor on login, login-via-email, admin-login, and change password routes. Adds registration area within existing user second factor preferences to register multiple security keys. Supports both external (yubikey) and built-in (macOS/android fingerprint readers).
Adds a second factor landing page that centralizes a user's second factor configuration.
This contains both TOTP and Backup, and also allows multiple TOTP tokens to be registered and organized by a name. Access to this page is authenticated via password, and cached for 30 minutes via a secure session.
implemented review items.
Blocking previous codes - valid 2-factor auth tokens can only be authenticated once/30 seconds.
I played with updating the “last used” any time the token was attempted but that seemed to be overkill, and frustrating as to why a token would fail.
Translatable texts.
Move second factor logic to a helper class.
Move second factor specific controller endpoints to its own controller.
Move serialization logic for 2-factor details in admin user views.
Add a login ember component for de-duplication
Fix up code formatting
Change verbiage of google authenticator
add controller tests:
second factor controller tests
change email tests
change password tests
admin login tests
add qunit tests - password reset, preferences
fix: check for 2factor on change email controller
fix: email controller - only show second factor errors on attempt
fix: check against 'true' to enable second factor.
Add modal for explaining what 2fa with links to Google Authenticator/FreeOTP
add two factor to email signin link
rate limit if second factor token present
add rate limiter test for second factor attempts
