Chromium's WebAuthn L3 JSON serialization methods ready for developer testing

Greetings WebAuthn Working and Community Groups,

Chromium's implementation of the WebAuthn L3 JSON serialization methods is
now ready for developer testing. We welcome developers to try it out and
provide feedback, especially if you're an existing user of the webauthn-json
<https://github.com/github/webauthn-json> ponyfill or of Mozilla's L3
implementation.

The implementation is currently behind a default disabled flag. To enable
it, follow these steps:

1. Navigate to chrome://flags/#enable-experimental-web-platform-features.
2. In the flag state dropdown menu, select Enabled.
3. Relaunch Chrome.

Testing requires Chrome 128.0.6551.0 or newer (i.e., Canary currently).

If you encounter any issues, please file a bug at https://crbug.com/new.

Thanks,
Martin Kreichgauer