UC Move Player: Setup Port (and some kind of implementation)

[StefanSchade]

When dealing with issue #2 it became apparant that the domain needs access to a repository that is not yet implemented.

• Define Repository Interfaces in the Port Module
• Implement Repositories in the Adapter Module (At present a hashmap implementation suffices)
• Inject Repositories into Domain Services
• Adjust Application Use Case

[StefanSchade]

We have to populate the in memory repo with test data as well - we will use a helper function reading the data from file

[StefanSchade]

code compiles and dummy endpoint

POST localhost:8080/player/move

with content

{ "direction": "north" }

gives 200 OK