Support for OAuth Profile for Open Public Clients #27352

Is your feature request related to a problem?

I want to use Authentik to provide users to my mailserver (Stalwart) and Mail applications. The Stalwart docs explains that this needs support for OAuth Profile for Open Public Clients: https://stalw.art/docs/auth/backend/oidc

Describe the solution you'd like

Through support for OAuth Profile for Open Public Clients, https://datatracker.ietf.org/doc/draft-ietf-mailmaint-oauth-public/ using Authentik with Stalwart and mail apps would be possible.

Describe alternatives that you've considered

Not use Authentik as an identity (OIDC) provider

Additional context

No response