This implements Webauthn. Old devices can be used to authenticate via the appid compatibility layer which should be automatic. New devices will be registered via Webauthn, and devices which do not support FIDO2 will no longer be able to be registered. At this time it does not fully support multiple devices (backend does, frontend doesn't allow registration of additional devices). Does not support passwordless.
This adds additional logging to the authentication logs such as type, remote IP, request method, redirect URL, and if the attempt was done during a ban. This also means we log attempts that occur when the attempt was blocked by the regulator for record keeping purposes, as well as record 2FA attempts which can be used to inform admins and later to regulate based on other factors.
Fixes#116, Fixes#1293.
