Add dependencies to distributed group chat example

[MohMaz]

Why are these changes needed?

Adding dependency list to group chat example so devs can easier try it and don't spend time on any possible version conflicts of extra dependencies (e.g. chainlit) with the autoge* dependencies.

Related issue number

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.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.80%. Comparing base (58d789a) to head (2814243).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5175      +/-   ##
==========================================
+ Coverage   70.53%   70.80%   +0.27%     
==========================================
  Files         174      174              
  Lines       11129    11229     +100     
==========================================
+ Hits         7850     7951     +101     
+ Misses       3279     3278       -1     

Flag	Coverage Δ
unittests	70.80% <ø> (+0.27%)	⬆️

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