big docs refactor (#1978)

Co-authored-by: Ankush Gola <ankush.gola@gmail.com>

docs/modules/indexes/document_loaders/examples/blackboard.ipynb

@@ -0,0 +1,38 @@
+{
+ "cells": [
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Blackboard\n",
+    "\n",
+    "This covers how to load data from a Blackboard Learn instance."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from langchain.document_loaders import BlackboardLoader\n",
+    "\n",
+    "loader = BlackboardLoader(\n",
+    "    blackboard_course_url=\"https://blackboard.example.com/webapps/blackboard/execute/announcement?method=search&context=course_entry&course_id=_123456_1\",\n",
+    "    bbrouter=\"expires:12345...\",\n",
+    "    load_all_recursively=True,\n",
+    ")\n",
+    "documents = loader.load()"
+   ]
+  }
+ ],
+ "metadata": {
+  "language_info": {
+   "name": "python"
+  },
+  "orig_nbformat": 4
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}