feat: add Momento as a standard cache and chat message history provider (#5221)

# Add Momento as a standard cache and chat message history provider

This PR adds Momento as a standard caching provider. Implements the
interface, adds integration tests, and documentation. We also add
Momento as a chat history message provider along with integration tests,
and documentation.

[Momento](https://www.gomomento.com/) is a fully serverless cache.
Similar to S3 or DynamoDB, it requires zero configuration,
infrastructure management, and is instantly available. Users sign up for
free and get 50GB of data in/out for free every month.

## Before submitting

✅ We have added documentation, notebooks, and integration tests
demonstrating usage.

Co-authored-by: Dev 2049 <dev.dev2049@gmail.com>

docs/modules/models/llms/examples/llm_caching.ipynb

@@ -41,7 +41,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 3,
+   "execution_count": 6,
    "id": "f69f6283",
    "metadata": {},
    "outputs": [],
@@ -612,6 +612,115 @@
     "llm(\"Tell me joke\")"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "726fe754",
+   "metadata": {},
+   "source": [
+    "## Momento Cache\n",
+    "Use [Momento](../../../../integrations/momento.md) to cache prompts and responses.\n",
+    "\n",
+    "Requires momento to use, uncomment below to install:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "e8949f29",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# !pip install momento"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "56ea6a08",
+   "metadata": {},
+   "source": [
+    "You'll need to get a Momemto auth token to use this class. This can either be passed in to a momento.CacheClient if you'd like to instantiate that directly, as a named parameter `auth_token` to `MomentoChatMessageHistory.from_client_params`, or can just be set as an environment variable `MOMENTO_AUTH_TOKEN`."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "id": "2005f03a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from datetime import timedelta\n",
+    "\n",
+    "from langchain.cache import MomentoCache\n",
+    "\n",
+    "\n",
+    "cache_name = \"langchain\"\n",
+    "ttl = timedelta(days=1)\n",
+    "langchain.llm_cache = MomentoCache.from_client_params(cache_name, ttl)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 10,
+   "id": "c6a6c238",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "CPU times: user 40.7 ms, sys: 16.5 ms, total: 57.2 ms\n",
+      "Wall time: 1.73 s\n"
+     ]
+    },
+    {
+     "data": {
+      "text/plain": [
+       "'\\n\\nWhy did the chicken cross the road?\\n\\nTo get to the other side!'"
+      ]
+     },
+     "execution_count": 10,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "%%time\n",
+    "# The first time, it is not yet in cache, so it should take longer\n",
+    "llm(\"Tell me a joke\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 11,
+   "id": "b8f78f9d",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "CPU times: user 3.16 ms, sys: 2.98 ms, total: 6.14 ms\n",
+      "Wall time: 57.9 ms\n"
+     ]
+    },
+    {
+     "data": {
+      "text/plain": [
+       "'\\n\\nWhy did the chicken cross the road?\\n\\nTo get to the other side!'"
+      ]
+     },
+     "execution_count": 11,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "%%time\n",
+    "# The second time it is, so it goes faster\n",
+    "# When run in the same region as the cache, latencies are single digit ms\n",
+    "llm(\"Tell me a joke\")"
+   ]
+  },
   {
    "cell_type": "markdown",
    "id": "934943dc",
@@ -909,9 +1018,9 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3",
+   "display_name": "venv",
    "language": "python",
-   "name": "python3"
+   "name": "venv"
   },
   "language_info": {
    "codemirror_mode": {
@@ -923,7 +1032,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.8.8"
+   "version": "3.11.3"
   }
  },
  "nbformat": 4,