feat: Implement SampleAppServiceTests for application service testing
feat: Create newProjectConfigureApplicationTests project for application layer tests
feat: Establish newProjectConfigureDomainTests project for domain layer tests
feat: Introduce Entity Framework Core tests for the newProjectConfigure application
feat: Develop console test application for HTTP API client demonstration
feat: Implement FakeCurrentPrincipalAccessor for testing purposes
chore: Set up test base classes and data seed contributors for consistent testing environment
