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

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

examples/tailwind/src/main.rs

@@ -2,7 +2,7 @@
 
 use dioxus::prelude::*;
 
-const _STYLE: &str = manganis::mg!(file("public/tailwind.css"));
+const _STYLE: &str = asset!("public/tailwind.css");
 
 fn main() {
     launch(app);