Is your proposal related to a problem?

As of March 2024, Storybook has released version 8 https://storybook.js.org/blog/storybook-8/

See https://storybook.js.org/docs/migration-guide

Describe the solution you’d like

Support Storybook v8

Additional context

• Upgrade to Storybook v7 #10 (it appears that, at least for Wagtail, v7 is already supported)