Ability to install/uninstall Appx Packages

Description

I see this module deals with Windows Capabilities but I didn't see anything that deals with AppX Packages. I don't know if this module is the right place for something like this but it seemed to be the closest I could find.

Proposed properties

Ensure = [Present,Absent]
Scope = ['AllUsers','PerUser']
RemoveAppxPackage = [$true,$false]
PreventReinstallFromWaaSUpgrades = [$true,$false]

Special considerations or limitations

The biggest problem might be figuring out what's safe to uninstall... unless we take the nix approach and assume people know what they're doing and just go for it (you can do an rm -rf / if you REALLY want to)? The next possible big problem is keeping current with what's per-user. I'm sure we can do a query to figure out if someone says "remove per-user Appx package X but it's not a per-user and we don't do it".

I haven't fleshed everything possible out on this but my immediate need is to remove Appx packages from newly minted Windows 10 machines along with making sure existing Windows 10 machines maintain a consistent configuration.

The issue names no files or tests; begin by reviewing the existing Windows Capabilities module and how its DSC resources model Ensure and Scope. Clarify the supported AppX package states, per-user versus all-user behavior, and upgrade-removal safety before implementation. Done means a defined resource can consistently install or remove the requested packages on Windows 10.