There doesn't seem to be a way to replicate the Visual Studio "Package and Publish" feature programatically

### Describe the bug

I've spent ages on this one, in Visual Studio you can right click on the project and produce an msixbundle, it all works just fine

But then, if you want your build server to do it, there doesn't seem to be any combination of commands that replicates what VS is doing, and that is just odd.

### Why is this important?

Developers shouldn't be building things manually.

### Steps to reproduce the bug

1. Create a a blank WinUI app, you'll get one with 3 runtime identifiers
2. Try generating an msixbundle via command line

### Actual behavior

_No response_

### Expected behavior

_No response_

### Screenshots

_No response_

### NuGet package version

Latest

### Windows version

_No response_

### Additional context

_No response_

Start by comparing Visual Studio's Package and Publish flow with the command-line steps for a blank WinUI app using three runtime identifiers. Investigate how the msixbundle is produced and identify the missing command or configuration needed for build-server use. Done means documenting or enabling a reproducible command-line equivalent.

Written by the indexing model from the issue text.