Enhancements: CLI Test Cases

[gowthamkishore3799]

Summary:

1. Added test cases for CLI with default options.
2. Added test cases for CLI with custom options passed from the command line.

Implementation Notes:

1. Ensured the default CLI options create the expected output without additional arguments.
2. Validated custom CLI options (e.g., custom file paths, max size, and exclude patterns) also work seamlessly.

Alternative Options Considered:
Instead of actually creating and removing the output file during the test, I considered mocking the os.open and related functions. However, I opted to test the entire process end-to-end to ensure seamless functionality.

[cyclotruc]

Thank you very much for your work!

I found those tests quite slow to run when i tried them in a codespace (4 cores 8gb ram)
Being slow to run means they risk being less helpful in a TDD context and I don't think that's something we want from the main test suite

So we can see it one of two ways:
1 - They are end-to-end tests and should be separated from the main test suite
2 - They are unit test so they should mock the necessary components to only test units and not integration

Happy to discuss this further if it's unclear what I mean by that

[gowthamkishore3799]

@cyclotruc Made a change to path which reduced the execution time right now, Initally had the path outside of directory, which should have been "./"

[cyclotruc]

Thanks a lot!
I tested it by breaking the CLi on purpose and the test failed, which is all we really needed