[SHACK-178] add PowerShell customization and shortcuts to Windows install

[robbkidd]

ChefDK does the included trickery to get paths and PowerShell configured for a reasonable Chef development environment.

• a startup PowerShell script for the trickery
• a shortcut to this script for start menu and desktop to help users get going
• tinkering with PowerShell registry things (that are mostly about making chef-client itself happy in a Windows environment)

Bonus'd MSI improvements:

• unzip all the files when a reinstall is selected in the installer
• icon file name updates because "project" is a boring name

[robbkidd]

The following shell command exited with status 210:

    $ candle.exe -nologo -arch x64 -dProjectSourceDir="C:\opscode\chef-workstation" "project-files.wxs"
 "C:\Users\jenkins\AppData\Local\Temp\chef-workstation20180518-2076-n65no5\source.wxs"

Output:

    project-files.wxs

source.wxs

C:\Users\jenkins\AppData\Local\Temp\chef-workstation20180518-2076-n65no5\source.wxs(151) :
 error CNDL0210 : The Feature/@Id attribute with value 'ChefWorkstationStartMenuShortcutFeature',
 is too long for a feature name.  Due to limitations in the Windows Installer, feature names cannot be
 longer than 38 characters in length.

OK. I suppose we'll have to go with ChefWS in the WiX XML ids. I'll work an update for that.