Opt-in to using <dialog> for error modals

[pascalbaljet]

This PR lets you opt-in to use the <dialog> element when Inertia shows the error modal.

It uses the new configuration system introduced in #2655, so you can opt-in to it with the future.useDialogForErrorModal flag. We'll probably enable this by default in the next major release.

createInertiaApp({
  // resolve, setup, etc.
  defaults: {
    future: {
      useDialogForErrorModal: true,
    },
  },
})