Update more examples, add css for more examples

examples/scroll_to_top.rs

@@ -1,3 +1,10 @@
+//! Scroll elements using their MountedData
+//!
+//! Dioxus exposes a few helpful APIs around elements (mimicking the DOM APIs) to allow you to interact with elements
+//! across the renderers. This includes scrolling, reading dimensions, and more.
+//!
+//! In this example we demonstrate how to scroll to the top of the page using the `scroll_to` method on the `MountedData`
+
 use dioxus::prelude::*;
 
 fn main() {