Fix props issue with storybook

[JoviDeCroock]

Fixes #775

The problem is the following

• Storybook accesses the text-node props
• getter returns { data: signal }
• Storybook recursively processes props.data
• Since the signal has React element decorations, it's treated as a valid React element
  and we recurse further

The solution here is to access .value to return a plain value.

EDIT: hah, looks like tests won't pass as we're relying on react accessing this property later when the sync-external-store runs
EDIT 2: attempt 2 doesn't work either as react will bail for these strict equal props 😅 this is a bit of a pickle

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[github-actions]

Size Change: +24 B (+0.02%)

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