[Discussion] xlings as a userspace OS: query, package ownership, resolution, and runtime boundaries

`subos.env` has no conditional op, so a package cannot offer "user's value wins"

`xlings use <pkg> <ver>` does not re-declare sysroot assets — GL keeps loading the old drivers

macos install_name_tool not found

[features]:xlings的安装路径自定义

xlings安装脚本忽略下载失败错误

[features]: Add --yes option for install command

下载失败后应动态检测网络环境

centos7.9 安装后找不到命令

xlings未能检测到环境变量中的vscode问题