feat(example): add sidebar to provider example

example/src/Provider/Sidebar.js

@@ -0,0 +1,25 @@
+import React from 'react';
+import { useStoreState } from 'react-flow-renderer';
+
+export default () => {
+  const nodes = useStoreState((store) => store.nodes);
+  const transform = useStoreState((store) => store.transform);
+
+  return (
+    <aside>
+      <div className="description">
+        This is an example of how you can access the internal state outside of the ReactFlow component.
+      </div>
+      <div className="title">Zoom & pan transform</div>
+      <div className="transform">
+        [{transform[0].toFixed(2)}, {transform[1].toFixed(2)}, {transform[2].toFixed(2)}]
+      </div>
+      <div className="title">Nodes</div>
+      {nodes.map((node) => (
+        <div key={node.id}>
+          Node {node.id} - x: {node.__rg.position.x.toFixed(2)}, y: {node.__rg.position.y.toFixed(2)}
+        </div>
+      ))}
+    </aside>
+  );
+};