FEATURE: Runnable with message history (#13418)

Add RunnableWithMessageHistory class that can wrap certain runnables and manages chat history for them.

docs/docs/use_cases/question_answering/index.ipynb

@@ -1051,6 +1051,14 @@
     ":::"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "fdf6c7e0-84f8-4747-b2ae-e84315152bd9",
+   "metadata": {},
+   "source": [
+    "Here we've gone over how to add chain logic for incorporating historical outputs. But how do we actually store and retrieve historical outputs for different sessions? For that check out the LCEL [How to add message history (memory)](/docs/expression_language/how_to/message_history) page."
+   ]
+  },
   {
    "cell_type": "markdown",
    "id": "580e18de-132d-4009-ba67-4aaf2c7717a2",