Initial Windows support for AppIconExtractor processor

[NickETH]

This PR extends the AppIconExtractor processor to work with Windows icons from EXE- and MSI-files.

[haircut]

First, apologies for the long delay in review @NickETH.

This is interesting work. Thank you for taking this on!

I have no experience running AutoPkg on Windows to build Windows software; would you mind providing an example recipe demonstrating your extension to this processor?

[NickETH]

Hi Mattew,
sorry for the delayed answer, was on vacation.
Have quite a few examples now, as we use it to generate the icons for our kiosk.
E.g: https://github.com/autopkg/NickETH-recipes/blob/master/Claris/FileMakerPro-Win64.build.recipe.yaml
Works really well. Great idea and work on your side, BTW. :-)
Most important would be to make sure, that my code does not affect the OSX part.
Nick

[NickETH]

Hi Mattew,
this is still open.
Do you think, you could commit that PR in near future?
Of course, i could also do a Windows only version.
But this would be the second-best option, IMHO.
Nick

[NickETH]

Hi Mattew,
what about this PR?
Would be cool, if you could merge it.
Nick