Add initial SSR support for LiveProvider previews

[tujoworker]

Summary

• render preview output during the initial SSR pass when LiveProvider can evaluate examples synchronously
• keep async transformCode deferred until hydration and avoid unhandled promise rejections during the render-time probe
• add SSR-specific tests and document the new behavior in the API and usage docs

Validation

• pnpm --filter react-live build
• pnpm --filter react-live typecheck
• pnpm --filter react-live lint
• pnpm --filter react-live test
• pnpm --filter react-live test:typings

Extra verification

• verified the resulting behavior in a local Eufemia consumer package for inline, noInline, sync transform, and async transform SSR cases

[vercel]

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