docs: add local LLMs page to v0.2 docs (#21493)

Adding this page from v0.1 docs:
https://python.langchain.com/v0.1/docs/guides/development/local_llms/

docs/docs/tutorials/local_rag.ipynb

@@ -11,7 +11,7 @@
     "\n",
     "LangChain has [integrations](https://integrations.langchain.com/) with many open-source LLMs that can be run locally.\n",
     "\n",
-    "See [here](/docs/tutorials/local_rag) for setup instructions for these LLMs. \n",
+    "See [here](/docs/how_to/local_llms) for setup instructions for these LLMs. \n",
     "\n",
     "For example, here we show how to run `GPT4All` or `LLaMA2` locally (e.g., on your laptop) using local embeddings and a local LLM.\n",
     "\n",
@@ -145,7 +145,7 @@
     "   \n",
     "And / or, you can download a GGUF converted model (e.g., [here](https://huggingface.co/TheBloke)).\n",
     "\n",
-    "Finally, as noted in detail [here](/docs/tutorials/local_rag) install `llama-cpp-python`"
+    "Finally, as noted in detail [here](/docs/how_to/local_llms) install `llama-cpp-python`"
    ]
   },
   {