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

从 ns clean 命令的入口开始，跟踪所选包管理器如何确定要删除哪个锁文件。配置 pnpm 后重现该问题，然后验证清理过程不再尝试删除 package-lock.json，并使用适当的包管理器行为完成操作。