Update the tests for Angular to run on an Angular workspace

[TrevorKarjanis]

Describe the issue
Originally #173

The tests for Angular also need to be expanded to validate that our configuration and how we document its use works with Angular workspaces and the VSCode extensions. This will be done in a separate PR.

The new flat configuration has characteristics that are specific to Angular and distinct between a root application and child projects.

1. Replace the tests/angular index file with an Angular workspace that includes a root and child project.
2. Ensure the file patterns in angular.json include JavaScript files.
3. Ensure the child project uses the project configuration to reference its TS configuration.
4. Develop a smoke test that ensures the linter configuration applies with the correct linter configurations with the root and separately child project.