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Release 4.4.4: Build System Modernization and Export Fixes
Description
This release modernizes the project's build system and toolchain while fixing critical export compatibility issues. The changes include migrating from yarn to npm, switching from eslint to biome for code formatting, replacing webpack with rollup for bundling, and implementing export validation to prevent future compatibility issues.
Related Issue
Result of https://arethetypeswrong.github.io/?p=%40adobe%2Fcss-tools%404.4.3

Motivation and Context
The project needed modernization of its build toolchain to improve maintainability and developer experience. The switch to biome provides better performance and more modern linting rules, while rollup offers a more efficient bundling process. The export fixes ensure the package works correctly across different bundlers and environments.
How Has This Been Tested?
@arethetypeswrong/cli
to ensure proper module compatibilityScreenshots (if appropriate):
Types of changes
Checklist:
Key Changes: