Firefighter first update

src/main/java/model/Box.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/model/Mountain.java

src/main/java/model/Road.java

src/main/java/model/Rockeries.java