Use Dependency Injection instead of exporting instances from app entrypoint

[pablomendezroyo]

For large Node.js projects, the dependency injection approach (passing instances as parameters) is generally the better choice because:

• It promotes testability and allows for easy mocking during unit tests.
• It enhances maintainability and scalability, as the components are loosely coupled.
• It provides greater flexibility when refactoring or evolving your application’s architecture.

To achieve this code structure this PR aims to remove all the exports of instances in the app entrypoint (index.ts) and pass them as parameters instead.

• Remove exports from entrypoint
• Inject instances as parameters
• Group large list of parameters into interfaces for better redability