chore: Wrap all stories in a Screen

[VincentSmedinga]

Describe the pull request

What

This wraps all stories of Storybook in a Screen component.

I’ve not made an exception for our page examples to keep the Skip Link spanning the entire page width. I think it’s best to limit that link to the Screen's width to prevent it from growing overly large on very wide screens. This doesn’t change its functionality. Few screens will be affected in practice.

Why

To ensure no example is wider than a Screen, which should not happen as we demand every page to be wrapped in such a component.

We could override the decorator for application screens later, but there’s no need now.

How

• Replaced the div lang="nl" that wrapped all stories, keeping the language attribute
• Removed decorators wrapping a Screen for component stories

Checklist

• Add or update unit tests
• Add or update documentation
• Add or update stories
• Add or update exports in index.* files
• Start the PR title with a Conventional Commit prefix

Additional notes

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