🧪 test: add comprehensive tests for stripAnsi

[Hardonian]

🎯 What: Replaced a single test with comprehensive unit tests for the stripAnsi utility function.
📊 Coverage: Covered edge cases such as undefined, empty strings, missing arguments, multi-ANSI codes, complex ANSI sequences, strings without ANSI codes, and non-string values coercion.
✨ Result: Enhanced test coverage and reliability for string manipulation.

Signed-off-by: Jules jules@example.com

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PR created automatically by Jules for task 15326792043863144001 started by @Hardonian

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