add example

examples/hot_reload.rs

@@ -0,0 +1,15 @@
+use dioxus::prelude::*;
+
+fn main() {
+    dioxus::desktop::launch_with_props(with_hot_reload, app, |b| b);
+}
+
+fn app(cx: Scope) -> Element {
+    let mut count = use_state(&cx, || 0);
+
+    cx.render(rsx! {
+        h1 { "High-Five counter: {count}" }
+        button { onclick: move |_| count += 1, "Up high!" }
+        button { onclick: move |_| count -= 1, "Down low!" }
+    })
+}