[Docs] Add ruff linting to .ipynb files (#645)

examples/plan-and-execute/plan-and-execute.ipynb

@@ -65,8 +65,8 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "import os\n",
     "import getpass\n",
+    "import os\n",
     "\n",
     "\n",
     "def _set_env(var: str):\n",
@@ -154,6 +154,7 @@
    "source": [
     "from langchain import hub\n",
     "from langchain_openai import ChatOpenAI\n",
+    "\n",
     "from langgraph.prebuilt import create_react_agent\n",
     "\n",
     "# Get the prompt to use - you can modify this!\n",
@@ -212,8 +213,8 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "from typing import List, Tuple, Annotated, TypedDict\n",
     "import operator\n",
+    "from typing import Annotated, List, Tuple, TypedDict\n",
     "\n",
     "\n",
     "class PlanExecute(TypedDict):\n",