Separate Resource Server Reactive Docs

Issue gh-10367

Author: jzheaux

docs/modules/ROOT/nav.adoc

@@ -109,7 +109,11 @@
 ** xref:reactive/oauth2/index.adoc[OAuth2]
 *** xref:reactive/oauth2/login.adoc[OAuth2 Log In]
 *** xref:reactive/oauth2/oauth2-client.adoc[OAuth2 Client]
-*** xref:reactive/oauth2/resource-server.adoc[OAuth2 Resource Server]
+*** xref:reactive/oauth2/resource-server/index.adoc[OAuth2 Resource Server]
+**** xref:reactive/oauth2/resource-server/jwt.adoc[JWT]
+**** xref:reactive/oauth2/resource-server/opaque-token.adoc[Opaque Token]
+**** xref:reactive/oauth2/resource-server/multitenancy.adoc[Multitenancy]
+**** xref:reactive/oauth2/resource-server/bearer-tokens.adoc[Bearer Tokens]
 ** xref:reactive/exploits/index.adoc[Protection Against Exploits]
 *** xref:reactive/exploits/csrf.adoc[CSRF]
 *** xref:reactive/exploits/headers.adoc[Headers]

docs/modules/ROOT/pages/reactive/oauth2/index.adoc

@@ -5,4 +5,4 @@ Spring Security provides OAuth2 and WebFlux integration for reactive application
 
 * xref:reactive/oauth2/login.adoc[OAuth2 Log In] - Authenticating with an OAuth2 or OpenID Connect 1.0 Provider
 * xref:reactive/oauth2/oauth2-client.adoc[OAuth2 Client] - Making requests to an OAuth2 Resource Server
-* xref:reactive/oauth2/resource-server.adoc[OAuth2 Resource Server] - Protecting a REST endpoint using OAuth2
+* xref:reactive/oauth2/resource-server/index.adoc[OAuth2 Resource Server] - Protecting a REST endpoint using OAuth2