Validity of the digital signature check (mac os/windows)

The aim of this issue is to have a simple verification of the digital signature of the installed (installer) application.

Input is a file with expected value to check from the signature and testing application.

Linux:

• flatpak probably might have a mechanism to show a digital certificate/signature or origin
• archive/rpm - here I am not sure

Windows:

• in poweshell, run Get-Authenticode my-app.exe

MacOS:

• in cli: codesign -dvvv /Applications/MyApp.app