Add missing API doc for Python code execution tool

[ekzhu]

• Add missing module doc file
• Add missing API doc

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.20%. Comparing base (4486c67) to head (0c08d29).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4901   +/-   ##
=======================================
  Coverage   68.20%   68.20%           
=======================================
  Files         158      158           
  Lines        9960     9960           
=======================================
  Hits         6793     6793           
  Misses       3167     3167           

Flag	Coverage Δ
unittests	68.20% <ø> (ø)

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[jackgerrits]

That example looks so good