Add sample for agentchat-streamlit integration

[tezansahu]

Why are these changes needed?

• Currently, there are hardly any tutorials to integrate agentchat with streamlit UI in an extensible manner (that includes processing to different Message types, including Tool invocation details
• This sample bridges the above gap & adds a link to a fairly holistic example that I've created, integrating agentchat with streamlit.

Related issue number

#4465

Checks

• I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://github.com/microsoft/autogen/blob/main/CONTRIBUTING.md to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• I've made sure all auto checks have passed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.67%. Comparing base (67ebeed) to head (9eb1197).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6664   +/-   ##
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  Coverage   79.67%   79.67%           
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  Files         231      231           
  Lines       17172    17172           
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  Hits        13682    13682           
  Misses       3490     3490           

Flag	Coverage Δ
unittests	79.67% <ø> (ø)

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[tezansahu]

@microsoft-github-policy-service agree

[victordibia]

The linked PR is already addressed with a sample.
https://github.com/microsoft/autogen/tree/main/python/samples/agentchat_streamlit

[tezansahu]

The sample added in the to close the issue #4465 contains an example without any tools, or agent teams. This is a much more comprehensive example.
I spoke to @ekzhu , who suggested to raise this PR.
Requesting you to consider

[victordibia]

Hi @tezansahu ,

Thanks again for the contribution. I agree with you that adding tool invocation details improves the quality of the current repo. Would you be willing to consider scoping the PR to extending the current sample to add tool call to the existing streamlit sample?

https://microsoft.github.io/autogen/dev/user-guide/agentchat-user-guide/quickstart.html . We can replicate the weather example in the docs

[tezansahu]

Okay, sure. I'll do that.