chore: rename all &cx to cx, make clipppy happy

examples/eval.rs

@@ -5,8 +5,8 @@ fn main() {
 }
 
 fn app(cx: Scope) -> Element {
-    let script = use_state(&cx, String::new);
-    let eval = dioxus_desktop::use_eval(&cx);
+    let script = use_state(cx, String::new);
+    let eval = dioxus_desktop::use_eval(cx);
 
     cx.render(rsx! {
         div {