more fullstack cleanups: loaders serialize, ServeConfig only (#4785)

* some opinionated cleanups in dioxus-server

* add serialize to loader

* add `result` to Resource

* clippy

* fix

* writable memos, resources, `onmount`, `.pending`, and `.value()` on actions

* fix compile issues

* fix typo

packages/fullstack-server/README.md

@@ -89,7 +89,7 @@ async fn main() {
     let router = axum::Router::new()
         // You can add a dioxus application to the router with the `serve_dioxus_application` method
         // This will add a fallback route to the router that will serve your component and server functions
-        .serve_dioxus_application(dioxus_server::ServeConfig::new().unwrap(), App);
+        .serve_dioxus_application(dioxus_server::ServeConfig::new(), App);
 
     // Finally, we can launch the server
     let router = router.into_make_service();