Add function generator and validator to gallery

[abhaymathur21]

Why are these changes needed?

Me and my team made this project where, in a custom-made UI, user input is taken for the task to be performed, the output format, the database schema and the language for the code to be written in. This is sent to an LLM which then generates code for a function that is meant to perform the specified task. This generated code is then sent to the AutoGen user_proxy and assistant agents where they are told to generate appropriate sample data relevant to the code and then run and test it on that data and fix any bugs and output the final working code.

This project has also been implemented as a VS Code extension to make life easier for developers.

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-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 36.95%. Comparing base (d35754d) to head (7bb318e).
Report is 584 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1807   +/-   ##
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  Coverage   36.95%   36.95%           
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  Files          62       62           
  Lines        6529     6529           
  Branches     1447     1447           
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  Hits         2413     2413           
  Misses       3922     3922           
  Partials      194      194           

Flag	Coverage Δ
unittests	36.95% <ø> (ø)

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[HyperCodec]

LGTM

[skzhang1]

LGTM