community[minor]: add Yuque document loader (#17924)

This pull request support loading documents from Yuque with Langchain.

Yuque is a professional cloud-based knowledge base for team
collaboration in documentation.

Website: https://www.yuque.com
OpenAPI: https://www.yuque.com/yuque/developer/openapi

docs/docs/integrations/document_loaders/yuque.ipynb

@@ -0,0 +1,77 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "66a7777e",
+   "metadata": {},
+   "source": [
+    "# Yuque\n",
+    "\n",
+    ">[Yuque](https://www.yuque.com/) is a professional cloud-based knowledge base for team collaboration in documentation.\n",
+    "\n",
+    "This notebook covers how to load documents from `Yuque`.\n",
+    "\n",
+    "You can obtain the personal access token by clicking on your personal avatar in the [Personal Settings](https://www.yuque.com/settings/tokens) page."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "9ec8a3b3",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "from langchain_community.document_loaders import YuqueLoader"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "outputs": [],
+   "source": [
+    "loader = YuqueLoader(access_token=\"<your_personal_access_token>\")"
+   ],
+   "metadata": {
+    "collapsed": false
+   },
+   "id": "2ea958f0327ed6e8"
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "3470dadf",
+   "metadata": {
+    "collapsed": false,
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "docs = loader.load()"
+   ]
+  }
+ ],
+ "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": "3.10.6"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}