Developers should be able to build integration tests with Playwright

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Is your feature request related to a problem? Please describe the problem.

Developers should be able to add Playwright tests to their .NET Aspire managed system and run them easily

### Describe the solution you'd like

Executing `dotnet test` against the AppHost project should run a suite of Playwright tests after starting the AppHost. When the test suite is completed, the AppHost should be stopped properly

### Additional context

_No response_