added cross env support for npm start and chromedriver support for macOS

[prachify]

Fixes #
Added cross environment support for npm start and chromedriver support for macOS.

Changelog Entry

Added cross environment support for npm start and chromedriver support for macOS.

Description

Updated the npm start command for cross-platform compatibility. Also added troubleshooting steps for common macOS errors when running test cases.

macOs.mov

windows_devbox.mov

• I have added tests and executed them locally
• I have updated CHANGELOG.md
• I have updated documentation

Review Checklist

This section is for contributors to review your work.

• Accessibility reviewed (tab order, content readability, alt text, color contrast)
• Browser and platform compatibilities reviewed
• CSS styles reviewed (minimal rules, no z-index)
• Documents reviewed (docs, samples, live demo)
• Internationalization reviewed (strings, unit formatting)
• package.json and package-lock.json reviewed
• Security reviewed (no data URIs, check for nonce leak)
• Tests reviewed (coverage, legitimacy)

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