Integrate OIDC Clients with Keycloak on Game Warden

Customers can integrate directly with Game Warden's Keycloak identity provider using a custom OIDC client instead of relying on Authservice. This covers requesting a client, choosing between public and confidential client types, application-side configuration, claims and group mapping, token lifetimes, and logout flows. See Custom OIDC client integration for the complete guide.