introduce local player

src/logic/EngineController.hpp

@@ -12,6 +12,7 @@ class LevelController;
 class EngineController {
     Engine& engine;
 
+    int64_t localPlayer = -1;
     void onMissingContent(const std::shared_ptr<ContentReport>& report);
 public:
     EngineController(Engine& engine);
@@ -37,5 +38,7 @@ public:
         const std::string& generatorID
     );
 
+    void setLocalPlayer(int64_t player);
+
     void reopenWorld(World* world);
 };