update the dioxus cratesio readme, add many more examples (#5501)

* update the dioxus cratesio readme

* fix example

* fix header

* add a bunch more examples

examples/03-assets-styling/favicon.rs

@@ -0,0 +1,23 @@
+//! Setting a favicon.
+//!
+//! Use `document::Link` with `rel: "icon"` to point the browser at a favicon. Combined with
+//! `asset!`, the favicon is bundled into the app and served with the same path-mangling
+//! and cache-busting as any other asset.
+
+use dioxus::prelude::*;
+
+const FAVICON: Asset = asset!("/examples/assets/logo.png");
+
+fn main() {
+    dioxus::launch(app);
+}
+
+fn app() -> Element {
+    rsx! {
+        // Link is a generic head element — for a favicon set rel="icon"
+        document::Link { rel: "icon", href: FAVICON }
+
+        h1 { "Check the browser tab!" }
+        p { "The favicon is loaded from examples/assets/logo.png." }
+    }
+}