CRUD Person

Currently we have the `User` entity which holds authentication information.
We also need a profile for each user. This profile will be filled after the account is created.
In order to hold information about this, we need a `Person` entity with the following attributes:
* first name
* last name
* address (street name, street number, ap. number, city, county, country, zip code)

There should be a `OneToOne` connection between a `Person` and an `User`

Create the full CRUD functionality (controller, service, repository, entity) and add tests for it