Implement Dependency Injection and Delegate Object Creation to Simplify Testing

[bchanez]

Currently, object creation is managed internally within classes, making the code harder to test, maintain, and extend. To simplify unit testing and improve the flexibility of our architecture, we should implement dependency injection (DI) and delegate object creation to external components (such as factories or DI frameworks).

By refactoring the code to use DI, we can decouple classes from their dependencies, making them more testable and easier to maintain. This will allow us to inject mocks and stubs in unit tests, simplifying the testing process and improving the overall quality of the codebase.