add example to website

[olaoluwasalami]

Why are these changes needed?

Related issue number

Add new example

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 ✅

Comparison is base (2d3ed96) 30.56% compared to head (6163111) 30.56%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #860   +/-   ##
=======================================
  Coverage   30.56%   30.56%           
=======================================
  Files          30       30           
  Lines        4028     4028           
  Branches      911      911           
=======================================
  Hits         1231     1231           
  Misses       2723     2723           
  Partials       74       74           

Flag	Coverage Δ
unittests	30.51% <ø> (ø)

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[sonichi]

The gallery is a better place to add this example. Let's solve #850 first.

[olaoluwasalami]

The gallery is a better place to add this example. Let's solve #850 first.

PR updated. added example to Gallery @sonichi @qingyun-wu

[qingyun-wu]

removing it from example