[SUGGESTION] Test Explorer is able to be grouped

Describe the feature you'd like

Im basing the Feature Request from what I see in Visual Studio 2022, where there are many additional option to group your tests into.

Benefits

1. Improved Organization: It helps keep your tests neatly organized and easy to locate. This can be particularly useful when dealing with a large number of tests.
2. Efficient Navigation: Testers can quickly navigate to the specific category they are interested in, saving time that would otherwise be spent scrolling through unrelated tests.
3. Easier Maintenance: When tests are grouped by category, it’s easier to maintain and update them. If a change is made that affects a specific category of tests, you can quickly locate and update these tests as needed.
4. Better Understanding: It provides a better understanding of what each test is supposed to validate by grouping related tests together.
5. Enhanced Collaboration: When multiple testers are adding to the repo, having tests grouped by category can help prevent duplication of effort and make it easier to divide work among team members.

Effective test management is maintaining a balance between granularity and simplicity. Too many categories can make the system confusing and difficult to navigate, while too few can lead to disorganization and inefficiency.

Alternatives considered

No response

Environment Information

No files, tests, or entry points are named. Start by reviewing the Test Explorer implementation and the Visual Studio 2022 grouping options shown in the issue, then define the supported grouping categories and how they should appear in VS Code. Done means the requested grouping behavior is specified, implemented, and verified in Test Explorer.