Add locale/language switcher to Storybook

[bjarnef]

As mentioned here #868 (comment) it would be great to add a locale/language switcher in Storybook.

Example:
https://storybook.js.org/blog/internationalize-components-with-storybook/

Seems to be something similar implemented here. Note how the localization change in date picker:
https://carbon.sage.com/?path=/docs/date-range--docs