Allow AppxBundle to be customised in msbuildprops

[cjhines]

Summary

Because of the hard-coded AppxBundle=Never option, you cannot override it with the msbuildprops property.

https://github.com/microsoft/react-native-windows/blob/main/packages/%40react-native-windows/cli/src/utils/msbuildtools.ts#L112

Ideally this reads the msbuildprops option before setting a default.

Motivation

Generating an .appxbundle still has some use cases. Currently this requires a package to the library

Basic Example

No response

Open Questions

No response

[chrisglein]

Interesting. Not sure why it's hardcoded to Never here. Seems like something that should be moved to the property sheets and allow an override.