[ENHANCEMENT] Enhance Suite Discovery to Ignore More Files and Folders, Including .gitignore

[d-biehl]

Description:
In my project, I use TypeScript, which results in a large node_modules directory. This significantly slows down the discovery of test suites and tests. To address this, I propose enhancing the SuiteStructureBuilder class to allow ignoring additional files and folders during the discovery process. This enhancement should also consider the existing .gitignore file to determine which files and folders to exclude.

Proposed Changes:

1. Modify the _is_included method in the SuiteStructureBuilder class to support additional ignore patterns specified by the user.
2. Implement functionality to read and parse a .gitignore file and integrate these patterns into the _is_included method.

Benefits:

• Improved flexibility in managing which files and folders are included in the discovery process.
• Simplified configuration by leveraging existing .gitignore files.
• Enhanced performance in projects with large directories like node_modules.