netspeed-cli 0.10.3

Command-line interface for testing internet bandwidth using speedtest.net
Documentation
## Description

Brief description of changes made.

Fixes #(issue)

## 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

## Checklist

- [ ] I have read the [CONTRIBUTING]CONTRIBUTING.md document
- [ ] My code follows the project's style guidelines (cargo fmt, clippy clean)
- [ ] 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 (README, CHANGELOG) if needed
- [ ] I have added my changes to the CHANGELOG under the "Unreleased" section

## Testing

Describe the tests you ran to verify your changes:

```bash
# Example: cargo test
# Example: cargo clippy -- -D warnings
```

## Screenshots (if applicable)

Add screenshots to help explain your changes.