Description

Use testing.TB interface instead of *testing.T across the testing package and add string helper functions (FirstToUpper, FirstToLower, Compose) to the strings package.

Type of Change

• 🐛 Bug fix
• ✨ New feature
• 💥 Breaking change
• 📝 Documentation
• ♻️ Refactoring
• ⚡ Performance
• ✅ Tests
• 🔧 Build/CI

Changes

• Replace *testing.T with testing.TB in all testing package helper functions, allowing use in both tests and benchmarks
• Remove custom Taggable interface in favor of stdlib testing.TB
• Add strings.FirstToUpper and strings.FirstToLower for first-character case conversion
• Add strings.Compose for chaining multiple string transformation functions

Checklist

• My code adheres to the coding and style guidelines of the project.
• I have performed a self-review of my own code.
• I have commented on my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.

Notes

The switch from *testing.T to testing.TB and the removal of the Taggable interface are breaking changes for any consumers that reference these types directly. However, all existing call sites passing *testing.T will continue to work since *testing.T implements testing.TB.