Firefighter rebuild

src/main/java/app/SimulatorApplication.java

src/main/java/controller/Controller.java

src/main/java/model/Board.java

src/main/java/model/Cloud.java

src/main/java/model/Extinguisher.java

src/main/java/model/Fire.java

src/main/java/model/Firefighter.java

src/main/java/model/FirefighterBoard.java

src/main/java/model/Item.java

src/main/java/view/FirefighterGrid.java

src/main/java/view/Grid.java