Allow resetting Society of Mind agent even if it hasn't been run before

[gagb]

What happened?

Currently if you call on_reset on a society of mind agent before .run() it will raise an error suggesting that the group chat needs to be initialized before it can be reset. @ekzhu and I discussed that this behavior is a bug.

What did you expect to happen?

no bugs

How can we reproduce it (as minimally and precisely as possible)?

Adapted from https://microsoft.github.io/autogen/stable/reference/python/autogen_agentchat.agents.html#autogen_agentchat.agents.SocietyOfMindAgent

import asyncio
from autogen_agentchat.messages import TextMessage
from autogen_agentchat.agents import AssistantAgent, SocietyOfMindAgent
from autogen_ext.models.openai import OpenAIChatCompletionClient
from autogen_agentchat.teams import RoundRobinGroupChat
from autogen_agentchat.conditions import TextMentionTermination


async def main() -> None:
    model_client = OpenAIChatCompletionClient(model="gpt-4o")

    agent1 = AssistantAgent("assistant1", model_client=model_client, system_message="You are a writer, write well.")
    agent2 = AssistantAgent(
        "assistant2",
        model_client=model_client,
        system_message="You are an editor, provide critical feedback. Respond with 'APPROVE' if the text addresses all feedbacks.",
    )
    inner_termination = TextMentionTermination("APPROVE")
    inner_team = RoundRobinGroupChat([agent1, agent2], termination_condition=inner_termination)

    society_of_mind_agent = SocietyOfMindAgent("society_of_mind", team=inner_team, model_client=model_client)

    await society_of_mind_agent.on_reset(cancellation_token=None)

    result = await society_of_mind_agent.on_messages(messages=[
        TextMessage(source="user", content="I am a writer.")
        ], 
        cancellation_token=None
    )
    print(result)


if __name__ == "__main__":
    asyncio.run(main())

AutoGen version

0.4.5

Which package was this bug in

AgentChat

Model used

gpt-4o

Python version

No response

Operating system

No response

Any additional info you think would be helpful for fixing this bug

No response