chore(react/hooks): add docs

packages/react/src/hooks/useNodes.ts

@@ -5,6 +5,12 @@ import type { Node, ReactFlowState } from '../types';
 
 const nodesSelector = (state: ReactFlowState) => state.nodes;
 
+/**
+ * Hook for getting the current nodes from the store.
+ *
+ * @public
+ * @returns An array of nodes
+ */
 function useNodes<NodeType extends Node = Node>(): NodeType[] {
   const nodes = useStore(nodesSelector, shallow) as NodeType[];