chore: import upstream snapshot with attribution

examples/basic/hello_world_jupyter.ipynb

@@ -0,0 +1,45 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "8a77ee2e-22f2-409c-837d-b994978b0aa2",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "A function calls self,  \n",
+      "Unraveling layers deep,  \n",
+      "Base case ends the quest.  \n",
+      "\n",
+      "Infinite loops lurk,  \n",
+      "Mind the base condition well,  \n",
+      "Or it will not work.  \n",
+      "\n",
+      "Trees and lists unfold,  \n",
+      "Elegant solutions bloom,  \n",
+      "Recursion's art told.\n"
+     ]
+    }
+   ],
+   "source": [
+    "from agents import Agent, Runner\n",
+    "\n",
+    "agent = Agent(name=\"Assistant\", instructions=\"You are a helpful assistant\")\n",
+    "\n",
+    "# Intended for Jupyter notebooks where there's an existing event loop\n",
+    "result = await Runner.run(agent, \"Write a haiku about recursion in programming.\")  # type: ignore[top-level-await]  # noqa: F704\n",
+    "print(result.final_output)"
+   ]
+  }
+ ],
+ "metadata": {
+  "language_info": {
+   "name": "python"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}