[feat] Allow macOS plugins to be written in Swift

[velocitysystems]

Describe the problem

Swift support is not available for macOS plugins. It is only available for iOS plugins.

Describe the solution you'd like

Since there are no production-ready Rust bindings for the macOS SDK, Swift support is needed for access to native APIs.

While Cacao is available for beta use, it is not exhaustive nor actively maintained e.g. Compared with windows-rs which is actively supported by contributors from Microsoft.

Alternatives considered

N/A

Additional context

See related discussion.