Add scoring for the game ¡Ship It!

[PeterJCLaw]

This depends on https://github.com/sourcebots/competition-simulator/pull/59.

Review:

• please focus on correctness relative to the rules
• if you can think of any other useful test cases, please do comment them
• it would be great to have the same person also review the related simulator PR (linked above)

Fixes https://github.com/sourcebots/tasks/issues/247

[prophile]

I'm happy with this as it is