Add back `designlibrary.json`

[splashdust]

This is a fix for the delignlibrary.json files that went missing after the upgrade to Storybook 7.

For now, these will just be static files that are copied to the output dir during build.

[green-design-system-bot[bot]]

🦋 Changeset status

None or empty changeset found. This PR will not result any new releases.

If you believe this is incorrect, please add a changeset by running npx changeset, and then commiting the resulting changeset file.

You can also explicitly add an empty changeset by running: npx changeset add --empty

[green-design-system-bot[bot]]

👋 Thanks for creating a pull request!

🚀 Checkout the storybooks we've created for it:

• angular
• angular-charts
• chlorophyll
• react
• react-charts