rasusa 4.0.0

Randomly subsample reads or alignments
## Description

<!-- Brief description of what this PR does -->

## Type of Change

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
- [ ] Documentation update
- [ ] Performance improvement
- [ ] Code refactoring

## Testing

- [ ] 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 tested on multiple platforms (if applicable)

## Documentation

- [ ] I have updated the documentation accordingly
- [ ] I have updated the CHANGELOG.md (if applicable)

## Checklist

- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my own code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] My changes generate no new warnings
- [ ] Any dependent changes have been merged and published in downstream modules

## Additional Notes

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