Support glob patterns for specifying multiple jacoco reports for multimodule projects

[cicirello]

Summary

Added support for using glob patterns to specify multiple jacoco report files for multimodule projects. Note that documentation will be updated at the time this feature is released, and README deliberately not updated yet (e.g., GitHub automatically propagates README changes to the Action's page in Marketplace regardless of whether a new release is created).

Closing Issues

Closes #112

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Improvements to existing code, such as refactoring or optimizations (non-breaking)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [x] I have read the CONTRIBUTING document.
• [x] My code follows the code style of this project.
• [x] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have added tests to cover my changes.
• [x] All new and existing tests passed.