langchain[minor]: Add StackExchange API integration (#14002)

Implements
[#12115](https://github.com/langchain-ai/langchain/issues/12115)

Who can review?
@baskaryan , @eyurtsev , @hwchase17 

Integrated Stack Exchange API into Langchain, enabling access to diverse
communities within the platform. This addition enhances Langchain's
capabilities by allowing users to query Stack Exchange for specialized
information and engage in discussions. The integration provides seamless
interaction with Stack Exchange content, offering content from varied
knowledge repositories.

A notebook example and test cases were included to demonstrate the
functionality and reliability of this integration.

- Add StackExchange as a tool.
- Add unit test for the StackExchange wrapper and tool.
- Add documentation for the StackExchange wrapper and tool.

If you have time, could you please review the code and provide any
feedback as necessary! My team is welcome to any suggestions.

---------

Co-authored-by: Yuval Kamani <yuvalkamani@gmail.com>
Co-authored-by: Aryan Thakur <aryanthakur@Aryans-MacBook-Pro.local>
Co-authored-by: Manas1818 <79381912+manas1818@users.noreply.github.com>
Co-authored-by: aryan-thakur <61063777+aryan-thakur@users.noreply.github.com>
Co-authored-by: Bagatur <baskaryan@gmail.com>

docs/docs/integrations/providers/stackexchange.mdx

@@ -0,0 +1,36 @@
+# Stack Exchange
+
+>[Stack Exchange](https://en.wikipedia.org/wiki/Stack_Exchange) is a network of 
+question-and-answer (Q&A) websites on topics in diverse fields, each site covering 
+a specific topic, where questions, answers, and users are subject to a reputation award process.
+
+This page covers how to use the `Stack Exchange API` within LangChain.
+
+## Installation and Setup
+- Install requirements with 
+```bash
+pip install stackapi
+```
+
+## Wrappers
+
+### Utility
+
+There exists a StackExchangeAPIWrapper utility which wraps this API. To import this utility:
+
+```python
+from langchain.utilities import StackExchangeAPIWrapper
+```
+
+For a more detailed walkthrough of this wrapper, see [this notebook](/docs/integrations/tools/stackexchange).
+
+### Tool
+
+You can also easily load this wrapper as a Tool (to use with an Agent).
+You can do this with:
+```python
+from langchain.agents import load_tools
+tools = load_tools(["stackexchange"])
+```
+
+For more information on tools, see [this page](/docs/modules/agents/tools/).

docs/docs/integrations/tools/stackexchange.ipynb

@@ -0,0 +1,74 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# StackExchange\n",
+    "\n",
+    "This notebook goes over how to use the stack exchange component.\n",
+    "\n",
+    "All you need to do is install stackapi:\n",
+    "1. pip install stackapi\n",
+    "\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "pip install stackapi"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from langchain.utilities import StackExchangeAPIWrapper"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "stackexchange = StackExchangeAPIWrapper()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "stackexchange.run(\"zsh: command not found: python\")"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.8.8"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}