Add abillity to control alert duration

It would be neat if it was possible to specify the duration of the the alert when presenting it. Right now the `duration` property is only available in the view, and not the AlertKitAPI wrapping class.

Context:
```swift
AlertKitAPI.present(
    title: "Oops",
    subtitle: error?.localizedDescription,
    icon: .error,
    style: .iOS17AppleMusic,
    haptic: .error
)
```