Adding engines to prevent installation for unsupported nodejs versions

[fantaJinMode]

Description

Adds an engines field to package.json declaring minimum supported runtime versions, preventing installation on incompatible Node.js or npm versions.

Why It Was Needed

The project requires Node.js 18+ (documented in prerequisites) but nothing enforced this at install time. Consumers on older Node.js versions could install the package and encounter runtime failures with no clear indication of the root cause.

Benefits

• npm warns (or errors with engine-strict) on unsupported Node.js/npm versions
• Aligns declared requirements with documented prerequisites
• Prevents hard-to-debug runtime failures on older environments

Type of Change

• 🐛 Bug fix (non-breaking change which fixes an issue)
• ✨ New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📝 Documentation update
• ♻️ Code refactoring
• ⚡ Performance improvement
• ✅ Test addition or update

Changes Made

• Added "engines": { "node": ">=18", "npm": ">=9" } to package.json

Testing

Successfully run npm run build

• Tests pass locally (npm test)
• New tests added for new functionality
• Existing tests updated (if needed)
• Type checking passes (npm run typecheck)

Checklist

• My code follows the project's code style
• 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 or errors
• 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
• Any dependent changes have been merged and published
• I have used conventional commit messages (e.g., feat:, fix:)
• I have signed the Contributor License Agreement (the CLA bot will prompt you)

Breaking Changes

None

[CLAassistant]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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