Make it easier to provide context to fullstack (#2515)

* pass context providers into server functions

* add an example for FromContext

* clean up DioxusRouterExt

* fix server function context

* fix fullstack desktop example

* fix axum auth example

* fix fullstack context type

* fix context providers path

packages/fullstack/examples/axum-desktop/src/server.rs

@@ -19,7 +19,7 @@ async fn main() {
     axum::serve(
         listener,
         axum::Router::new()
-            .register_server_fns()
+            .register_server_functions()
             .into_make_service(),
     )
     .await