Done the select difficulty button

app/src/main/java/school_project/Menu/MenuAccueil.java

@@ -17,6 +17,7 @@ public class MenuAccueil extends StackPane {
         //create all the objet that I need
         ChoiceBox SlctDifficulty = new ChoiceBox();
         SlctDifficulty.getItems().addAll("Easy", "Medium", "Difficult");
+
         Label RdmLvl = new Label("Random Level : ");
         Button SelectLevel= new Button("Select Level");
         Label Title = new Label("Welcome to Road to Master");