fix: reduce layout trashing

[stipsan]

This is not a complete fix, but it reduces layout trashing by no longer reading document.body.offsetWidth during a snapshot handler of useSyncExternalStore.

The "React way" of measuring layout is to use useLayoutEffect: https://react.dev/reference/react/useLayoutEffect#measuring-layout-before-the-browser-repaints-the-screen

A follow up PR (based on #1368) will move tooltip layout measuring to use the size middleware, which is equivalent to using useLayoutEffect and completely solves layout trashing during render.
However, refactoring to that middleware requires more testing to ensure it doesn't cause regression bugs. That's the main justification for this PR.

While at it this PR:

• Updates deps that renovate can't merge as they require minor code refactors (chore(deps): update dependency @types/testing-library__jest-dom to v6 #1313, chore(deps): update dependency @testing-library/jest-dom to v6 #1311, chore(deps): update storybook monorepo to ^8.2.1 #1271)
• Changes the custom prettier config to reuse @sanity/prettier-config.
• Handles the deprecation warning from storybook that happens during pnpm install:

  deprecated @storybook/[email protected]: In Storybook 8, this package functionality has been integrated to a new package called @storybook/test, which uses Vitest APIs for an improved experience. When upgrading to Storybook 8 with 'npx storybook@latest upgrade', you will get prompted and will get an automigration for the new package. Please migrate when you can.

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Name	Status	Preview	Comments	Updated (UTC)
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