If you need to create real GUI tools to interact with the user in PowerShell you're probably going to choose either Windows Forms (WinForms) or Windows Presentation Foundation (WPF).However, there are ...

If you want your ASP.Net Core application to transmit data over HTTP in a format that isn’t supported by one of these built-in formatters, then you will need to create a custom output formatter.

Take advantage of the built-in support for OpenAPI in ASP.NET Core to automatically document your HTTP endpoints. Minimal APIs are supported too.