docs: Ahmed body example for external aero simulation

[agvarghe]

Description

New example , Modeling of ahmed body for external aero simulation

Issue linked

1885

Checklist

• I have tested my changes locally.
• I have added necessary documentation or updated existing documentation.
• I have followed the coding style guidelines of this project.
• I have added appropriate unit tests.
• I have reviewed my changes before submitting this pull request.
• I have linked the issue or issues that are solved to the PR if any.
• I have assigned this PR to myself.
• I have added the minimum version decorator to any new backend method implemented.
• I have made sure that the title of my PR follows Conventional commits style (e.g. feat: extrude circle to cylinder)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.38%. Comparing base (d3d6c77) to head (a1dc0c7).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1886   +/-   ##
=======================================
  Coverage   90.38%   90.38%           
=======================================
  Files         105      105           
  Lines        9330     9330           
=======================================
  Hits         8433     8433           
  Misses        897      897           

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[RobPasMue]

Thanks a lot for the thorough review @PipKat!! ❤️