- Add winget_integration_test.go for Windows integration testing
- Add Windows CI job (windows-latest) for unit + detect tests
- Add cross-compile CI matrix (windows, darwin, freebsd, openbsd)
- Update README with winget in supported managers and capability matrix
- Include Windows coverage in codecov upload
- New 'windows' job runs unit tests on windows-latest with coverage
- New 'cross-compile' matrix job builds for windows/darwin/freebsd/openbsd
- Integration test file for winget (gated behind integration build tag)
- Windows coverage included in codecov upload