refactor(index): cache child process options

[Fdawgs]

Checklist

• Run npm test
• Commit message adheres to the Conventional commits style, following the @commitlint/config-conventional config

[Copilot]

Pull request overview

This PR refactors src/index.js to reuse a shared child process options object (currently { windowsHide: true }) across spawnSync and spawn calls, aiming to reduce duplication and centralize configuration.

Changes:

• Introduced CHILD_PROCESS_OPTS constant for common node:child_process options.
• Replaced inline { windowsHide: true } objects in spawnSync calls with the shared constant.
• Spread the shared options into the spawn options object to combine with signal.

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