refactor(packages): change package structure

packages/react/src/hooks/useNodes.ts

@@ -0,0 +1,14 @@
+import { shallow } from 'zustand/shallow';
+
+import { useStore } from '../hooks/useStore';
+import type { Node, ReactFlowState } from '../types';
+
+const nodesSelector = (state: ReactFlowState) => state.getNodes();
+
+function useNodes<NodeData>(): Node<NodeData>[] {
+  const nodes = useStore(nodesSelector, shallow);
+
+  return nodes;
+}
+
+export default useNodes;