wip: move everything over to a stack dst

examples/hello_world.rs

@@ -4,7 +4,7 @@ fn main() {
     dioxus::desktop::launch(App, |c| c);
 }
 
-fn App((cx, props): Component<()>) -> DomTree {
+fn App((cx, props): Component<()>) -> Element {
     cx.render(rsx! (
         div { "Hello, world!" }
     ))