auto_load_commands now defaults to False

[tleonhardt]

The auto_load_commands argument to the cmd2.Cmd.__init__ initializer now defaults to False.

Also:

• The tests_isolated directory has been deleted and all tests underneath there have been moved under tests

Switching the default value for auto_load_commands was required in order to be able to run all of the tests in the same suite. Alternatively, we would have had to change every single cmd2.Cmd instance in the main tests and set auto_load_commands=False.

[github-actions]

🤖 Hi @tleonhardt, I've received your request, and I'm working on it now! You can track my progress in the logs for more details.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.92%. Comparing base (26ca1f9) to head (afed344).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1520      +/-   ##
==========================================
+ Coverage   98.90%   98.92%   +0.02%     
==========================================
  Files          21       21              
  Lines        4933     4933              
==========================================
+ Hits         4879     4880       +1     
+ Misses         54       53       -1     

Flag	Coverage Δ
unittests	98.92% <ø> (+0.02%)	⬆️

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[github-actions]

📋 Review Summary

This pull request updates the default behavior of auto_load_commands to False, which is a significant but well-documented change. The consolidation of tests from tests_isolated into the tests directory is a great improvement for maintainability.

🔍 General Feedback

• The changes are well-documented in the CHANGELOG.md and docs/upgrades.md files.
• The tests have been updated to reflect the new default behavior of auto_load_commands.
• The removal of the tests_isolated directory simplifies the project structure.