chore: add engines field for Node.js version support

[srinidhi-2006-bit]

Summary

Added an engines field to package.json to specify the supported Node.js version and improve environment consistency across contributors and deployment environments.

Closes #994

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Type of Change

• Bug fix
• New feature
• Developer Experience / Configuration improvement
• Refactor / code cleanup

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Changes Made

• Added an engines field to package.json
• Specified supported Node.js version (>=20.0.0)
• Improved consistency across local development and deployment environments
• Helps prevent version-related compatibility issues

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How to Test

1. Open package.json
2. Verify the following section exists:

"engines": {
  "node": ">=20.0.0"
}

3. Run:

npm install

4. Confirm dependencies install successfully
5. Verify the project runs normally

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Screenshots (if UI change)

N/A

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Checklist

• Linked issue in summary
• npm run lint passes locally
• No TypeScript errors (npm run type-check)
• Self-reviewed the diff
• Added/updated tests if applicable

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Additional Notes

This change helps contributors and deployment platforms use compatible Node.js versions, reducing setup and runtime issues caused by version mismatches.

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[github-actions]

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