Support for anthropic models in v0.4

[raagul-qb]

What feature would you like to be added?

Currently there is no way to use anthropic models with autogen 0.4 I need a way to use Claude models just like I was able to do so in 0.2.

Also there is no support for performing RAG as of now

Why is this needed?

Claude models are better at planning and deliberating in multiagent environments.

RAG support makes the the agent capable of handling a variety of tasks

[ekzhu]

Thanks @raagul-qb. I am editing this Issue to remove the RAG part to help making this issue more specific.

@rohanthacker was that you or someone else posted on Reddit about working on an Anthropic client?

[ekzhu]

For RAG, please see rag tools like graphrag: https://microsoft.github.io/autogen/stable/reference/python/autogen_ext.tools.graphrag.html#autogen_ext.tools.graphrag.LocalSearchTool, checkout samples too. https://github.com/microsoft/autogen/tree/main/python/samples/agentchat_graphrag

For RAG agent, use this #4742 to track

[rohanthacker]

Yes that was me. I've built out initial versions of the gemini and anthropic clients.

[ekzhu]

Thanks! I have been using the Azure AI client now. Thanks for your contribution.

Would love to review the PR for Gemini and Anthropic clients.