Demo of SvelteKit/Storybook bug

sveltejs/kit#7257

If a story component imports '$app/navigation', SvelteKit emits this error when rendering the story:

Cannot read properties of undefined (reading 'disable_scroll_handling')
TypeError: Cannot read properties of undefined (reading 'disable_scroll_handling')
    at http://localhost:6006/node_modules/@sveltejs/kit/src/runtime/app/navigation.js?v=b4aad7c7:14:11

Steps to reproduce

1. Scaffold new SvelteKit project:

   npm create svelte@latest my-app
   cd my-app
   npm install

2. Add Storybook:

   npx storybook@next init

3. Edit src/stories/Button.svelte to import '$app/navigation':

   <script lang="ts">
     import { goto } from '$app/navigation';
   </script>

4. Run Storybook:

   npm run storybook

5. Open the Button story in the browser.