[chore:] load settings on startup

core/src/main/java/com/fiewie/idlespaceshiptycoon/MainGame.java

@@ -10,7 +10,7 @@ public class MainGame extends Game {
     @Override
     public void create() {
         Navigator.game = this;
-        Navigator.settings = new Settings(); // will be replaced by data loading function
+        Navigator.loadSettings();
         Navigator.settings.users.add(new User("test", "123", "a@b.de")); // Test-User
         // Navigator.registerStage("registerMenu", new Stage(new RegisterMenu()));
         // Navigator.registerStage("accountMenu", new Stage(new AccountMenu()));