Allow relative assets in rust > 1.88 (#4658)

* Allow relative assets in rust > 1.88 and assets outside of the crate in
binary crates

* undo changes to assets outside of the crate

* don't use relative assets in examples

examples/visible.rs

@@ -10,7 +10,7 @@ fn app() -> Element {
     let mut animated_classes = use_signal(|| ["animated-text", ""]);
 
     rsx! {
-        document::Link { rel: "stylesheet", href: asset!("./examples/assets/visible.css") }
+        document::Link { rel: "stylesheet", href: asset!("/examples/assets/visible.css") }
 
         div {
             class: "container",