add everyting for docs

docs/extras/integrations/document_loaders/slack.ipynb

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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "1dc7df1d",
+   "metadata": {},
+   "source": [
+    "# Slack\n",
+    "\n",
+    ">[Slack](https://slack.com/) is an instant messaging program.\n",
+    "\n",
+    "This notebook covers how to load documents from a Zipfile generated from a `Slack` export.\n",
+    "\n",
+    "In order to get this `Slack` export, follow these instructions:\n",
+    "\n",
+    "## 🧑 Instructions for ingesting your own dataset\n",
+    "\n",
+    "Export your Slack data. You can do this by going to your Workspace Management page and clicking the Import/Export option ({your_slack_domain}.slack.com/services/export). Then, choose the right date range and click `Start export`. Slack will send you an email and a DM when the export is ready.\n",
+    "\n",
+    "The download will produce a `.zip` file in your Downloads folder (or wherever your downloads can be found, depending on your OS configuration).\n",
+    "\n",
+    "Copy the path to the `.zip` file, and assign it as `LOCAL_ZIPFILE` below."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "007c5cbf",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from langchain.document_loaders import SlackDirectoryLoader"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "a1caec59",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Optionally set your Slack URL. This will give you proper URLs in the docs sources.\n",
+    "SLACK_WORKSPACE_URL = \"https://xxx.slack.com\"\n",
+    "LOCAL_ZIPFILE = \"\"  # Paste the local paty to your Slack zip file here.\n",
+    "\n",
+    "loader = SlackDirectoryLoader(LOCAL_ZIPFILE, SLACK_WORKSPACE_URL)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "b1c30ff7",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "docs = loader.load()\n",
+    "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": "3.10.6"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}