adds --ignore functionality to ignore files

[rathi-yash]

Description

This PR introduces the --ignore feature, allowing users to specify paths that should be skipped during dead code detection by deadcode-detective.

• Added the --ignore flag to exclude user-specified paths from analysis.
• Implemented error handling for path expansion issues that occur when using Git Bash.
• This is an interim solution—once a configuration file is introduced, path handling will be managed more effectively.

Future Considerations

• The config file implementation will provide a more robust way to handle ignored paths, eliminating the need for manual flag input.

Type of Change

• New feature

Checklist

• My code follows the project's coding style and guidelines.
• I have performed a self-review of my code.
• I have commented my code where necessary.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• I have updated the documentation as needed.

Additional Information