chore(examples): add old api examples

example/src_oldapi/Provider/Sidebar.tsx

@@ -0,0 +1,36 @@
+import React from 'react';
+import { useStoreState, useStoreActions } from 'react-flow-renderer';
+
+const Sidebar = () => {
+  const nodes = useStoreState((store) => store.nodes);
+  const transform = useStoreState((store) => store.transform);
+  const setSelectedElements = useStoreActions((actions) => actions.setSelectedElements);
+
+  const selectAll = () => {
+    setSelectedElements(nodes.map((node) => ({ id: node.id, type: node.type })));
+  };
+
+  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.__rf.position.x.toFixed(2)}, y: {node.__rf.position.y.toFixed(2)}
+        </div>
+      ))}
+
+      <div className="selectall">
+        <button onClick={selectAll}>select all nodes</button>
+      </div>
+    </aside>
+  );
+};
+
+export default Sidebar;