Unify shortcut format

[Ana06]

VM-Install-Shortcut ensures shortcuts are created always in the same way. I personally find it useful to display the executed command for console applications as some times the help message does not include how to re-run the tool.

VM-Install-Single-Ps1 and VM-Install-Raw-GitHub-Repo use Install-ChocolateyShortcut (instead of VM-Install-Shortcut) to run with Powershell. VM-Install-Single-Ps1 Powershell with cmd while VM-Install-Raw-GitHub-Reporuns Powershell directly. I find it confusing not to know what they run as in any of them the executed command is not displayed (I can check the shortcut, but I think this is not obvious for all users and also not a nice way to do it).

I suggest we add a Powershell option to VM-Install-Shortcut that renders what is being executed and uses Powershell directly.

[Ana06]

Documenting discussion with @MalwareMechanic:

• We agree that it's useful to display what commands get executed when a LNK is clicked
• We agree that shortcut helpers should be unified to support PowerShell as the default prompt

[Ana06]

The metapackage template is using Install-ChocolateyShortcut. We probably want to update it to use VM-Install-Shortcut instead.

[Ana06]

This comment from #800 (comment) could be checked/addressed when addressing this issue:

the cd not needed because we have it already in -WorkingDirectory $executableDir? If so, we should change this in VM-Install-Shortcut.

[Ana06]

@emtuls this issue is related to other issues you have worked on recently. I had assigned to myself, but I won't have time in the next weeks. So if you have time, please take it! 😄