feat(core): add contextual JS class transforms

[sonofmagic]

Summary

• make JS mangling context-aware instead of replacing every string literal/template token
• add transformer.classFunctions for class helper calls such as cva, tv, clsx, cn, classnames, and twJoin
• preserve twMerge arguments by default so runtime merge semantics keep original Tailwind classes

Behavior change

This intentionally changes JS transform behavior: arbitrary business strings are no longer mangled, while explicit class contexts and configured class helper functions still are.

Testing

• pnpm --filter @tailwindcss-mangle/config test
• pnpm --filter @tailwindcss-mangle/core test
• pnpm --filter unplugin-tailwindcss-mangle test
• pnpm --filter @tailwindcss-mangle/config build
• pnpm --filter @tailwindcss-mangle/core build
• pnpm --filter unplugin-tailwindcss-mangle build
• pnpm lint
• pnpm lint:style

[changeset-bot]

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Latest commit: bed0e71

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