Refactor 5 more upstream security guides to the preferred Quarkus diataxis style and content guidelines.

1. OIDC client doc (RHBQ supported): 
OIDC CONNECT CONFIGURATION PROPERTIES

2. Smallrye JWT doc (RHBQ supported)
Using JWT RBAC

3. Keycloak Authorization doc (RHBQ supported)
USING OPENID CONNECT (OIDC) AND KEYCLOAK TO CENTRALIZE AUTHORIZATION

4. CSRF prevention feature (not RHBQ supported yet)
CROSS-SITE REQUEST FORGERY PREVENTION

5. WebAuthn (Stephane will support you here -  not RHBQ supported yet)
USING SECURITY WITH WEBAUTHN

Ensure each guide is recomposed using the new upstream doc templates and the following upstream doc contributor guide instructions, which support the next epic  to single-source and publish downstream.

• Quarkus style and content guidelines
• Quarkus documentation content types
• Contribute to Quarkus documentation