📖 docs: integrations/agent_toolkits (#9333)

Note: There are no changes in the file names!

- The group name on the main navbar changed: `Agent toolkits` -> `Agents
& Toolkits`. Examples here are the mix of the Agent and Toolkit examples
because Agents and Toolkits in examples are always used together.
- Titles changed: removed "Agent" and "Toolkit" suffixes. The reason is
the same.
- Formatting: mostly cleaning the header structure, so it could be
better on the right-side navbar.

Main navbar is looking much cleaner now.

docs/extras/integrations/toolkits/json.ipynb

@@ -5,9 +5,10 @@
    "id": "85fb2c03-ab88-4c8c-97e3-a7f2954555ab",
    "metadata": {},
    "source": [
-    "# JSON Agent\n",
+    "# JSON\n",
     "\n",
-    "This notebook showcases an agent designed to interact with large JSON/dict objects. This is useful when you want to answer questions about a JSON blob that's too large to fit in the context window of an LLM. The agent is able to iteratively explore the blob to find what it needs to answer the user's question.\n",
+    "This notebook showcases an agent interacting with large `JSON/dict` objects. \n",
+    "This is useful when you want to answer questions about a JSON blob that's too large to fit in the context window of an LLM. The agent is able to iteratively explore the blob to find what it needs to answer the user's question.\n",
     "\n",
     "In the below example, we are using the OpenAPI spec for the OpenAI API, which you can find [here](https://github.com/openai/openai-openapi/blob/master/openapi.yaml).\n",
     "\n",
@@ -179,7 +180,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.9"
+   "version": "3.10.12"
   }
  },
  "nbformat": 4,