To add scripts to the Universal platform, you can do it via the admin console or the file system. The Visual Studio Code extension also provides integration for managing the scripts.ps1 configuration file.
The Scripts tree view will provide access to each of your scripts, the admin console the scripts.ps1 file.
To add a new script to the Universal platform, you can create the PS1 file on the file system and then add the script to the scripts.ps1. The file name is relative to the repository folder. You can also use fully qualified file paths.