examples: add Arrow.js SSR example

[pi0]

Summary

• Add vite-ssr-arrow example with Arrow.js (~3KB reactive UI)
• Todo app showcasing reactive state, components with props, keyed lists, computed filtering, and watch effects
• SSR via @arrow-js/ssr with client-side takeover for interactivity

Notes

• @arrow-js/vite-plugin-arrow is workspace-only (aliases to monorepo paths), so we configure ssr.noExternal directly
• Hydration (@arrow-js/hydrate) doesn't adopt event listeners yet — using client-side mount as workaround

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch example-arrow-js

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Project	Deployment	Actions	Updated (UTC)
nitro.build	Ready	Preview, Comment	Mar 24, 2026 8:19pm