Replace ESLint fixAll with Biome codeActionsOnSave settings:
- source.fixAll.biome: applies safe lint fixes (e.g., removing unused imports)
- source.organizeImports.biome: sorts and organizes imports/exports
Both are needed separately because they serve different purposes:
- fixAll handles lint rule auto-fixes
- organizeImports handles import sorting/ordering
This aligns with Biome being the default formatter in this repo.
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
