This is follow-up after KEYCLOAK-10890 (FAPI 1 support).
It involves adding support to Keycloak for various features, related to FAPI 2. This means PAR, RAR, Grant Management for OAuth2, DPoP, QWacs etc.
We may consider adding stuff related to OpenBanking UK and OpenBanking Brasil to this epic as well.
Task of this epic might be worked on and reviewed by members of FAPI WG https://github.com/keycloak/kc-sig-fapi/blob/master/members.adoc . Anyone is welcome to join the working group, participate in the discussions, review pull requests and contribute features.