docs: move reference up a level

reference/empty.rs

@@ -0,0 +1,8 @@
+//! Example: Null/None Children
+//! ---------------------------
+//!
+//! This is a simple pattern that allows you to return no elements!
+
+use dioxus::prelude::*;
+
+pub static Example: FC<()> = |cx, props| cx.render(rsx! { Fragment {} });