Added engine info to fix the build issue

[sauravpanda]

Update package.json for demo app

• Purpose:
  Update the version and Node.js engine requirements for the demo application.
• Key Changes:
  • Bumped the version from 1.0.1 to 1.0.2
  • Added a new engines field to specify Node.js version >=18.18.0
• Impact:
  This will ensure the demo app is compatible with the latest Node.js version and provide clear requirements for developers.

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Original Description

## Description

Type of change

• Bug fix
• New feature
• Breaking change
• Documentation update

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[kaizen-bot]

🔍 Code Review Summary

✅ All Clear: This commit looks good! 👍

Overview

• Total Feedbacks: 0 (Critical: 0, Refinements: 0)
• Files Affected: 0
• Code Quality: [█████████████████░░░] 85% (Good)

Test Cases

2 file need updates to their tests. Run !unittest to generate create and update tests.

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