refactoring: Added comments to QuitCommand

src/main/java/org/bitbiome/commands/QuitCommand.java

@@ -6,6 +6,10 @@ import java.util.Scanner;
 
 public class QuitCommand implements CommandAPI {
 
+    // This command is used to end the game via command
+    // When the player quits the game, the game is stopped through System.exit(0)
+    // That means it is exited with no error status
+    
     @Override
     public void performCommand(Scanner scanner, boolean isRunning, String message, TravelEngine travelEngine) {
         System.out.println(getQuitMessage());