feat (documents): add LarkSuite document loader (#6420)

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### Summary

This PR adds a LarkSuite (FeiShu) document loader. 
> [LarkSuite](https://www.larksuite.com/) is an enterprise collaboration
platform developed by ByteDance.

### Tests

- an integration test case is added
- an example notebook showing usage is added. [Notebook
preview](https://github.com/yaohui-wyh/langchain/blob/master/docs/extras/modules/data_connection/document_loaders/integrations/larksuite.ipynb)

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### Who can review?

- PTAL @eyurtsev @hwchase17

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---------

Co-authored-by: Yaohui Wang <wangyaohui.01@bytedance.com>

docs/extras/modules/data_connection/document_loaders/integrations/larksuite.ipynb

@@ -0,0 +1,103 @@
+{
+ "cells": [
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "id": "33205b12",
+   "metadata": {},
+   "source": [
+    "# LarkSuite (FeiShu)\n",
+    "\n",
+    ">[LarkSuite](https://www.larksuite.com/) is an enterprise collaboration platform developed by ByteDance.\n",
+    "\n",
+    "This notebook covers how to load data from the `LarkSuite` REST API into a format that can be ingested into LangChain, along with example usage for text summarization.\n",
+    "\n",
+    "The LarkSuite API requires an access token (tenant_access_token or user_access_token), checkout [LarkSuite open platform document](https://open.larksuite.com/document) for API details."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "90b69c94",
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2023-06-19T10:05:03.645161Z",
+     "start_time": "2023-06-19T10:04:49.541968Z"
+    },
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "from getpass import getpass\n",
+    "from langchain.document_loaders.larksuite import LarkSuiteDocLoader\n",
+    "\n",
+    "DOMAIN = input(\"larksuite domain\")\n",
+    "ACCESS_TOKEN = getpass(\"larksuite tenant_access_token or user_access_token\")\n",
+    "DOCUMENT_ID = input(\"larksuite document id\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "13deb0f5",
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2023-06-19T10:05:36.016495Z",
+     "start_time": "2023-06-19T10:05:35.360884Z"
+    }
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[Document(page_content='Test Doc\\nThis is a Test Doc\\n\\n1\\n2\\n3\\n\\n', metadata={'document_id': 'V76kdbd2HoBbYJxdiNNccajunPf', 'revision_id': 11, 'title': 'Test Doc'})]\n"
+     ]
+    }
+   ],
+   "source": [
+    "from pprint import pprint\n",
+    "\n",
+    "larksuite_loader = LarkSuiteDocLoader(DOMAIN, ACCESS_TOKEN, DOCUMENT_ID)\n",
+    "docs = larksuite_loader.load()\n",
+    "\n",
+    "pprint(docs)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "9ccc1e2f",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# see https://python.langchain.com/docs/use_cases/summarization for more details\n",
+    "from langchain.chains.summarize import load_summarize_chain\n",
+    "\n",
+    "chain = load_summarize_chain(llm, chain_type=\"map_reduce\")\n",
+    "chain.run(docs)"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "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": "3.11.3"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}