Wildcard: Standalone documentation site

Created by: umpox

This issue is a placeholder for future work on the Wildcard component library documentation site.

We should update this ticket with any additional context we gather that would be useful when developing this.

Related feedback

I wish the storybook deployed at https://storybook.sgdev.org/ had examples and prop descriptions — I can, of course, go find the storybooks in repo and look at them, but distinguishing the idiomatic way of using components from all the options isn't always obvious. (https://github.com/sourcegraph/sourcegraph/issues/28982)