This is the core API to be translated into the platform it runs on. Offical implementations of ShipsCore are CoreForBukkit (Bukkit API), CoreForPaper (Paper API - paired with Bukkit API) and CoreForSponge (Spongepowered API).
See it here
Get started here
Run the TranslateCore with the implementation you wish with the following command
java -cp TranslateCore.jar org.core.terminal.Terminal