Legger til en funksjon for å få alle levende roboter fra Board

src/main/java/inf112/fiasko/roborally/objects/Board.java

@@ -73,6 +73,14 @@ public class Board {
         deadRobots = new ArrayList<>();
     }
 
+    /**
+     * Gets all alive robots from the board
+     * @return A list of alive robots
+     */
+    public List<Robot> getAliveRobots() {
+        return new ArrayList<>(robots.values());
+    }
+
     /**
      * Removes a dead robot from the board over to the dead robot list
      * @param robot the dead robot