Update VS Code tutorial series for .NET 6

[tdykstra]

Fixes #25834
Also updates some things that were missed when the Visual Studio tutorials were updated.

File Type	File Name	Published Url
Content	docs/core/tutorials/with-visual-studio-code.md	https://review.docs.microsoft.com/en-us/dotnet/core/tutorials/with-visual-studio-code?branch=pr-en-us-26631
Content	docs/core/tutorials/debugging-with-visual-studio-code.md	https://review.docs.microsoft.com/en-us/dotnet/core/tutorials/debugging-with-visual-studio-code?branch=pr-en-us-26631
Content	docs/core/tutorials/publishing-with-visual-studio-code.md	https://review.docs.microsoft.com/en-us/dotnet/core/tutorials/publishing-with-visual-studio-code?branch=pr-en-us-26631
Content	docs/core/tutorials/library-with-visual-studio-code.md	https://review.docs.microsoft.com/en-us/dotnet/core/tutorials/library-with-visual-studio-code?branch=pr-en-us-26631
Content	docs/core/tutorials/testing-library-with-visual-studio-code.md	https://review.docs.microsoft.com/en-us/dotnet/core/tutorials/testing-library-with-visual-studio-code?branch=pr-en-us-26631

[adegeo]

@tdykstra I'll review this today. tomorrow.... 😁

[adegeo]

Looks great overall. There is a main step missing in the debugging with vs article, hence requesting changes. But I have a lot of other little feedback too.

One thing I was thinking about was the second code folder for the article: library-with-visual-studio-6-0 I've run into this with WPF XAML stuff and I've adopted the underscore as a separator between the name of the article and some identifier simply because it visually differentiates the article name and id: library-with-visual-studio_6-0 (considering we're not supposed to have underscores in the article file name)

[adegeo]

At this point, the launch file doesn't exist. If the user followed the previous article, they just have a normal console app that isn't configured to debug/run within VSCode. They need to

1. Select the on Run & Debug tab
2. Press the Run & Debug button

Then they'll be presented with the option to generate a launch.json file for the .NET environment:

[tdykstra]

The launch file is created in step 7 of Tutorial 1 Create the app section. when you open a .cs file for the first time. That's the reason for the step text "Select Yes if Visual Studio Code prompts you to add the missing assets to build and debug your app."

[adegeo]

The (Preview) is going to have to be removed from framework selection

[tdykstra]

On GA-day I'll do a search through the repo for instances of "Preview" that need to go away.

[adegeo]

Considering you looked at all my feedback, I'll approve while you get things fixed. If you want me to look over it again (if you do some pivot tests) tag me and I'll check them out.