refactor(examples): update custom node example, create rich example

example/src/index.js

@@ -2,7 +2,8 @@ import React from 'react';
 import ReactDOM from 'react-dom';
 import { BrowserRouter as Router, Route, Switch } from 'react-router-dom';
 
-import CustomNodes from './CustomNodes';
+import CustomNode from './CustomNode';
+import Rich from './Rich';
 import Basic from './Basic';
 import Empty from './Empty';
 import Inactive from './Inactive';
@@ -21,8 +22,11 @@ ReactDOM.render((
       <Route path="/inactive">
         <Inactive />
       </Route>
+      <Route path="/custom-node">
+        <CustomNode />
+      </Route>
       <Route path="/">
-        <CustomNodes />
+        <Rich />
       </Route>
     </Switch>
   </Router>