docs(react): cleanup storybook, tweak setup

[IanVS]

These are fairly minor tweaks and fixes that I ran into when I was converting this repo over to vite storybook. They can be reviewed/considered apart from any other changes.

I'll fill out the changelog if requested (if there's a chance of merging, basically). Hopefully the commits are atomic enough to make them easy to review.

Changelog

New

• {{new thing}}

Changed

• {{change thing}}

Removed

• {{removed thing}}

Testing / Reviewing

Verify that the storybook still builds in dev and production, and there are no runtime errors.

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[joshblack]

Thanks for taking the time to do this @IanVS! I really appreciate it 🙏

[joshblack]

bump @aledavila @abbeyhrt when you get a sec!