ns clean doesnt respect package manager

Issue Description

If I set pnpm as the ns package manager and run ns clean it tries to remove package-lock.json which obviously doesnt exist

Reproduction

1. Use any ns project
2. set pnpm as package manager
3. run ns clean

Relevant log output (if applicable)

No response

Environment

echo 'y' | npx nativescript-envinfo Doesnt show pnpm version. So this makes no sense

Please accept these terms

• I have searched the existing issues as well as StackOverflow and this has not been posted before
• This is a bug report
• I agree to follow this project's Code of Conduct

從 ns clean 命令的進入點開始，追蹤所選套件管理器如何決定要移除哪個鎖定檔。設定 pnpm 後重現此問題，接著驗證清理程序不再嘗試移除 package-lock.json，並使用適當的套件管理器行為完成操作。