Unpackaged app deployment

[davidbritch]

Fixes #2415

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docs/whats-new/dotnet-9.md	docs/whats-new/dotnet-9
docs/windows/setup.md	docs/windows/setup

[davidbritch]

@BethMassi Two questions:

1. Is the ability to switch between packaged and unpackaged .NET 9 only, or also .NET 8? At the moment I limited that content in the doc to .NET 9.
2. Maybe the new content should go at the top of the doc? I've tried it both ways around and I keep changing my mind on what works best. We can, if required, have different orderings in the .NET 8 and .NET 9 versions of the doc.

[BethMassi]

Hi @davidbritch
The ability to switch in the VS IDE exists for .NET 8 and 9 projects (VS version 17.12). However, only .NET 9 projects default to Unpackaged. .NET 8 projects are unchanged (default to Packaged). I also think it's helpful to show the code changes that the IDE actually makes in the .csproj and launchSetting.json. If someone has defined multiple launch settings, then the IDE switch will not touch those entries.

[BethMassi]

2. Maybe the new content should go at the top of the doc? I've tried it both ways around and I keep changing my mind on what works best. We can, if required, have different orderings in the .NET 8 and .NET 9 versions of the doc.

I think it would be better in the .NET 9 version to jump right to the Windows debug target (since you get Unpackaged by default) and then show folks how they can switch to packaged if needed.

[davidbritch]

@BethMassi Should be good now.

[BethMassi]

Looks great, just one suggestion.