Support OpenAI Assistant v2 API

[seta0909]

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Example Code

import { OpenAIAssistantRunnable } from "langchain/experimental/openai_assistant";
const alice = await OpenAIAssistantRunnable.createAssistant({
      model: "gpt-4o",
      instructions:
        `you are a assistant`,
      name: "Test",
      tools: [{ type: 'code_interpreter' }, { type: 'file_search' }],
      fileIds: files,
      asAgent: true,
    });

Description

• I tried to use openai assistant with gpt-4o but I got an error from openai

The requested model 'gpt-4o' cannot be used with the Assistants API in v1. Follow the migration guide to upgrade to v2: https://platform.openai.com/docs/assistants/migration

And I know Python langchain already has OpenAIAssistantV2Runnable.
https://api.python.langchain.com/en/latest/agents/langchain.agents.openai_assistant.base_v2.OpenAIAssistantV2Runnable.html

do we have v2 assistant?

System Info

platform mac
node v20.13.0
yarn 1.22.19