Add a way to stream output to a UI via sockets

[tyler-suard-parker]

@sonichi @davorrunje

Why are these changes needed?

Because it is nice to use AutoGen as a backend and stream to a frontend

I added a Singleton, which can be used by multiple scripts. The singleton gets defined in the main script, and we store a socket connection in one of its variables. Then we can easily pass that socket connection down to oai\client.py and use that script to stream back text to a UI.

Related issue number

Closes Issue #1199

Checks

• I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://microsoft.github.io/autogen/docs/Contribute#documentation 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.

[ekzhu]

@tyler-suard-parker thanks for the PR, there is another PR that seems to address the same issue. I wrote some comment there. Do you want to take a look? #1414 and perhaps join forces?

[tyler-suard-parker]

PR closed: using a singleton would prevent multiple users from accessing the same Autogen instance running on a server.
@ekzhu Thank you, I am also @Tylersuard, so I will be happy to join forces with myself 😄