Expose state property

[heaths]

The state property calculated for an instance by the query API contains flags that might be better exposed as more typical boolean properties like IsRebootRequired, HasErrors, etc. Could also expose the numeric value but typical use cases won't know how to process those without the header.

This works better in the https://github.com/Microsoft/vssetup.powershell project for the VSSetup PowerShell module given the grammar supports bitwise comparisons based on numeric value or named value. But there's been enough questions like, "why is -all required to show my instance?" that it might be worth exposing more common reasons.