fix the macro export and WIP hot reloading docs

packages/dioxus/src/lib.rs

@@ -31,4 +31,7 @@ pub mod prelude {
 
     #[cfg(feature = "html")]
     pub use dioxus_elements::{prelude::*, GlobalAttributes, SvgAttributes};
+
+    #[cfg(feature = "hot-reload")]
+    pub use dioxus_hot_reload::hot_reload_init;
 }