[_] refactor: restructure folders and modules

[apsantiso]

Changes

• Include room and roomUser inside the calls module as they belong to the same bounded context. Creating a separated module for rooms when rooms do not exists outside of the context of a call does not make sense. The call module was highly coupled to the rooms module without any domain.
• Reduced try/catch usage inside the usecases, we can log any unexpected error using a httpExceptionFilter
• Error handling logic is moved to the controllers / infrastructure layer unless needed (it is not a must to leave the logger in the infra, at least for me)

What does this PR does not change / looks for?

• Unit tests are fixed to go according the new structure, however, this does not looks to fix bad tests cases. If there's some test that needs to be refactored / re-implemented (there are some of them), let's do it in another time.
• The main logic does not change, any previous bug or behavior still remains, this is just some preparation so we can fix/implement features smoothly
• We do not want to be dogmatic and apply every DDD/clean architecture definition, this PR only reduces some of the not required coupling.