refactor: clarify runtimes and isNode behavior

[pi0]

🔗 Linked issue

closes #100

❓ Type of change

• 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (3250631) 80.63% compared to head (381069c) 82.50%.

❗ Current head 381069c differs from pull request most recent head bec505d. Consider uploading reports for the commit bec505d to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #108      +/-   ##
==========================================
+ Coverage   80.63%   82.50%   +1.87%     
==========================================
  Files          10       10              
  Lines         346      383      +37     
  Branches       32       32              
==========================================
+ Hits          279      316      +37     
  Misses         61       61              
  Partials        6        6              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.