refactor(examples): switch examples from cra to nextjs

examples/nextjs/pages/Stress/utils.ts

@@ -0,0 +1,46 @@
+import { Node, Edge } from '@react-flow/core';
+
+type ElementsCollection = {
+  nodes: Node[];
+  edges: Edge[];
+};
+
+export function getNodesAndEdges(
+  xElements: number = 10,
+  yElements: number = 10
+): ElementsCollection {
+  const initialNodes = [];
+  const initialEdges: Edge[] = [];
+  let nodeId = 1;
+  let recentNodeId = null;
+
+  for (let y = 0; y < yElements; y++) {
+    for (let x = 0; x < xElements; x++) {
+      const position = { x: x * 100, y: y * 50 };
+      const data = { label: `Node ${nodeId}` };
+      const node = {
+        id: nodeId.toString(),
+        style: { width: 50, fontSize: 11 },
+        data,
+        position,
+      };
+      initialNodes.push(node);
+
+      if (recentNodeId && nodeId <= xElements * yElements) {
+        initialEdges.push({
+          id: `${x}-${y}`,
+          source: recentNodeId.toString(),
+          target: nodeId.toString(),
+        });
+      }
+
+      recentNodeId = nodeId;
+      nodeId++;
+    }
+  }
+
+  return {
+    nodes: initialNodes,
+    edges: initialEdges,
+  };
+}