Expose Outside layout

[thomasvantuycom]

While customizing the login screen for magic link sign-in, I noticed that the Outside Inertia page template is not exported via @statamic/cms/inertia.

It would be helpful if the Outside template were exposed through the package, allowing developers to reuse and extend it when building custom authentication views (such as magic link sign-in screens) without needing to reimplement the layout from scratch.