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

packages/signals/examples/context.rs

@@ -7,16 +7,16 @@ fn main() {
     dioxus_desktop::launch(app);
 }
 
-fn app(cx: Scope) -> Element {
+fn app() -> Element {
     // Because signal is never read in this component, this component will not rerun when the signal changes
-    use_context_provider(cx, || Signal::new(0));
+    use_context_provider(|| Signal::new(0));
 
     render! {
         Child {}
     }
 }
 
-fn Child(cx: Scope) -> Element {
+fn Child() -> Element {
     let signal: Signal<i32> = *use_context(cx).unwrap();
     // This component does read from the signal, so when the signal changes it will rerun
     render! {