add twitter chat loader doc (#9737)

docs/extras/integrations/chat_loaders/twitter.ipynb

@@ -0,0 +1,77 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "d86853d2",
+   "metadata": {},
+   "source": [
+    "# Twitter (via Apify)\n",
+    "\n",
+    "This notebook shows how to load chat messages from Twitter to finetune on. We do this by utilizing Apify. \n",
+    "\n",
+    "First, use Apify to export tweets. An example"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "e5034b4e",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import json\n",
+    "from langchain.schema import AIMessage\n",
+    "from langchain.adapters.openai import convert_message_to_dict"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "8bf0fb93",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "with open('example_data/dataset_twitter-scraper_2023-08-23_22-13-19-740.json') as f:\n",
+    "    data = json.load(f)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "468124fa",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Filter out tweets that reference other tweets, because it's a bit weird\n",
+    "tweets = [d[\"full_text\"] for d in data if \"t.co\" not in d['full_text']]\n",
+    "# Create them as AI messages\n",
+    "messages = [AIMessage(content=t) for t in tweets]\n",
+    "# Add in a system message at the start\n",
+    "# TODO: we could try to extract the subject from the tweets, and put that in the system message.\n",
+    "system_message = {\"role\": \"system\", \"content\": \"write a tweet\"}\n",
+    "data = [[system_message, convert_message_to_dict(m)] for m in messages]"
+   ]
+  }
+ ],
+ "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": "3.10.1"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}