Update more examples, add css for more examples

examples/shortcut.rs

@@ -1,3 +1,10 @@
+//! Add global shortcuts to your app while a component is active
+//!
+//! This demo shows how to add a global shortcut to your app that toggles a signal. You could use this to implement
+//! a raycast-type app, or to add a global shortcut to your app that toggles a component on and off.
+//!
+//! These are *global* shortcuts, so they will work even if your app is not in focus.
+
 use dioxus::desktop::use_global_shortcut;
 use dioxus::prelude::*;