[docs] Adding cli start command#3239

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adding-cli-start

Commits on Feb 3, 2026

Update Playground CLI documentation to reflect new commands and features. Added details for `start` and `server` commands, updated Node.js version requirement to 22.18, and clarified data persisten…
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Update Node.js version requirement in Playground CLI documentation from 22.18 to 22.12 for accuracy.
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