Add A Stateful Dev Environment by Jupiter example to gallery

[randombet]

Why are these changes needed?

Jupyter Notebooks offer agents:
stateful code execution
a record of the conversation
an iterative environment where the team can ReAct to data and errors as the project progresses.

Notebooks also allow us humans to examine the team's output in a convenient format and even return to the notebook at a later date, to pick up from where we left off.

Most importantly, this implementation is easy and requires little code

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 (fd0094c) 32.48% compared to head (f80c6f8) 32.48%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1376   +/-   ##
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  Coverage   32.48%   32.48%           
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  Files          41       41           
  Lines        4907     4907           
  Branches     1120     1120           
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  Hits         1594     1594           
  Misses       3187     3187           
  Partials      126      126           

Flag	Coverage Δ
unittests	32.44% <ø> (ø)

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[randombet]

@sonichi @olimoz @randombet

[ekzhu]

It’s weird PR description but okay…

Should wait for the author of notebook first.

[ekzhu]

I made some edits to the description. @olimoz waiting for your final resolution :D

[olimoz]

Woops, bit late to this conversation. Please go ahead.

Meanwhile, I have drafted an implementation of the code executor for Jupyter Notebooks.
See: https://github.com/olimoz/AI_Teams_AutoGen/blob/main/JupyterNotebooksForAutoGen_Capability.ipynb

Uses capability, add_to_agent() and a NotebookCodeExecutor which is inspired by IPythonCodeExecutor at
https://app.codecov.io/gh/microsoft/autogen/pull/1405/blob/autogen/coding/ipython_code_executor.py

[olimoz]

Typo in description, spurious 's' after 'Team'.
Should read....

"description": "An AutoGen Team Powered by Jupyter Notebook."