reestructure the entire fucking thing

[matheusfiorin]

Related to: #7

Rationale:

In order to use the correct hexagonal architecture we must change all of the project structure into the correct patterns that this architectural design proposes. We had some misunderstandings about how it has to be.

This PR will need to:

• create the right ports part of the structure, with the internal/external ports;
• separate correctly the adapters;
• separate correctly the core of the application;

This will allow us to have a more clear and concise application helping us to maintain and understand the flow of the data within our application.

[JohnPCarvalho]

I already merged my changes from the PR #8.

We can continue this task now. Remember: we will need to rebase with main and work with what we have here.