Add a Critic role

[dcieslak19973]

Is your feature request related to a problem? Please describe. Having dabbled in TaskWeaver and AutoGen, I think that AutoGen's use of a "Critic" agent which weighs in on both plans and code can frequently improve the agent's overall ability to satisfy a user request.

Describe the solution you'd like Add an additional role of Critic w/in TaskWeaver. The critic would review both Plans and Code before those roles passed them along.

Describe alternatives you've considered N/A

Additional context N/A