fix: 💄 improve error messaging and increase coverage

[mandy8055]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (28f159c) to head (c4e5f4c).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##             main        #8       +/-   ##
============================================
+ Coverage   61.76%   100.00%   +38.23%     
============================================
  Files           2         2               
  Lines          34        30        -4     
  Branches        5         4        -1     
============================================
+ Hits           21        30        +9     
+ Misses          9         0        -9     
+ Partials        4         0        -4     

Flag	Coverage Δ
core	100.00% <100.00%> (+38.23%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
packages/core/src/errors.ts	100.00% <100.00%> (+40.74%)	⬆️

... and 1 file with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.