Use head elements and new manganis syntax in examples (#2688)

* use head elements and new manganis syntax in examples
* only enable desktop workspace example scraping during a dioxus release

---------

Co-authored-by: Jonathan Kelley <jkelleyrtp@gmail.com>

examples/calculator_mutable.rs

@@ -25,13 +25,11 @@ fn main() {
         .launch(app);
 }
 
-const STYLE: &str = include_str!("./assets/calculator.css");
-
 fn app() -> Element {
     let mut state = use_signal(Calculator::new);
 
     rsx! {
-        style { {STYLE} }
+        head::Link { rel: "stylesheet", href: asset!("./examples/assets/calculator.css") }
         div { id: "wrapper",
             div { class: "app",
                 div {