The repository currently includes an AppVeyor configuration file (appveyor.yml), which appears to be used for testing on Windows. However, GitHub Actions is already in use for CI/CD, and Windows-based testing can be integrated into the existing GitHub Actions workflow. Is AppVeyor providing any unique value that GitHub Actions does not?

Proposed Changes

• Integrate Windows testing into the GitHub Actions workflow.
• Remove the appveyor.yml configuration if it's no longer needed.
• Update the README to remove the AppVeyor status badge.