Convert upm package offline for use on computers without network connectivity
将 upm 包转换为离线，以便在没有网络连接的电脑上使用
Use openupm-cli
openupm add com.u2sb.package-offline
Use git
https://github.com/u2sb/UnityPackageOffline.git?path=/Assets/Scripts
Click U2SB/PackageOffline/ConvertToLocal in the menu bar and wait patiently for the Console window to appear Completed
菜单栏点击 U2SB/PackageOffline/ConvertToLocal，并耐心等待 Console 窗口出现 Completed