This PR adds a simple run.py script to address the issue where users expect to run py run.py and receive "test done" as output instead of "tets".

The implementation includes:

• A minimal Python script that outputs "test done" when executed
• Proper shebang for cross-platform compatibility
• Clear documentation explaining the script's purpose
• Code that follows the project's linting standards (flake8, black)

Usage:

python run.py
# Output: test done

The script is intentionally minimal to provide the expected functionality without adding unnecessary complexity to the repository.

Fixes #4.

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