Fix the router and stub out a number of crates to get compiling

examples/dynamic_asset.rs

@@ -5,8 +5,8 @@ fn main() {
     dioxus_desktop::launch(app);
 }
 
-fn app(cx: Scope) -> Element {
-    use_asset_handler(cx, "logos", |request, response| {
+fn app() -> Element {
+    use_asset_handler("logos", |request, response| {
         // Note that the "logos" prefix is stripped from the URI
         //
         // However, the asset is absolute to its "virtual folder" - meaning it starts with a leading slash