Convert all our scripts to PowerShell

[pauldendulk]

The problem We have to maintain two versions of some script (.sh and .cmd). This extra maintenance. We also use PowerShell scripts in other cases. So, we need to maintain three types of scripts. PowerShell works on all platforms so let's use that.

The proposed solution Convert the .sh and .cmd scripts with powershell. Or remove them if possible.

Additional context

Files involved:

• Scripts\test-image-copier.cmd
• Scripts\InstallDependencies.cmd
• Scripts\NugetRestore.cmd
• docfx\build-site.cmd
• Scripts\Mac\buildpack.sh
• Scripts\Mac\cleanup.sh
• docfx\build-site.sh