Renderers are now packages, not features. (#387)

* feat: use synchronous router design

* feat: function to get router out of dom

* chore: restructure workspace to use renderers as packages, not features

examples/custom_element.rs

@@ -10,7 +10,7 @@ fn main() {
     let mut dom = VirtualDom::new(app);
     let _ = dom.rebuild();
 
-    let output = dioxus::ssr::render_vdom(&dom);
+    let output = dioxus_ssr::render_vdom(&dom);
 
     println!("{}", output);
 }