We use Nuget to manage our internal toolchain and installing some PowerShell scripts, which we currently manually include in Visual Studio via custom \"External Tools...\" m
I am looking for same thing and so far it looks like there is no way how to interact with IDE from PowerShell. But I found this package http://www.nuget.org/packages/StudioShell.Provider/ and at the first sight it allows you to do advanced stuff which you can do only with plugins and extensions. But in my opinion it is little bit overkill for this problem.