[Enhancement] Support langchain tools

[bidyapati-p]

Summary

LangChain tools support with wrapper class

Explain the features implemented:

- Import the tools and use it in the agent node

How to Test the feature

Steps for reviewers to verify functionality(example to import PlayWright tool):

1. Add the class (also install relevant libraries)

from langchain_community.agent_toolkits import PlayWrightBrowserToolkit
from langchain_community.tools.playwright.utils import (
    create_async_playwright_browser,  # A synchronous browser is available, though it isn't compatible with jupyter.\n",	  },
)

import nest_asyncio
class PlayWrightBrowserTools(LangChainToolsWrapper):
    def get_tools(self):
        nest_asyncio.apply()

        async_browser = create_async_playwright_browser()
        toolkit = PlayWrightBrowserToolkit.from_browser(async_browser=async_browser)
        return toolkit.get_tools()

2. Use the class path in the tools list in the graph config yaml file:

tools
    - tasks.examples.agent_tool_simulation.tools_from_class.PlayWrightBrowserTools

3. Verify the flow for query like "What are the headers on langchain.com?"

Checklist

• Lint fixes and unit testing done
• End to end task testing
• Documentation updated

Notes

Any caveats, future considerations, or known issues.

[amitsnow]

LGTM

[psriramsnc]

LGTM