How to download and setup cli
Open terminal and run command
git clone https://github.com/godot-package-manager/cli.git
git clone is used to create a copy or clone of cli repositories.
You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with cli https://github.com/godot-package-manager/cli/archive/master.zip
Or simply clone cli with SSH
[email protected]:godot-package-manager/cli.git