only implement T -> Readonlysignal

examples/signals.rs

@@ -59,15 +59,13 @@ fn app() -> Element {
         }
 
         // You can pass a value directly to any prop that accepts a signal
-        Child { count: 0 }
+        Child { count: doubled_count() }
     }
 }
 
 #[component]
-fn Child(mut count: Signal<i32>) -> Element {
+fn Child(mut count: ReadOnlySignal<i32>) -> Element {
     rsx! {
         h1 { "{count}" }
-        button { onclick: move |_| count += 1, "Up high!" }
-        button { onclick: move |_| count -= 1, "Down low!" }
     }
 }