add gameover callback

src/main/java/com/fossgalaxy/games/fireworks/GameRunner.java

@@ -238,6 +238,12 @@ public class GameRunner {
                     }
                 }
             }
+
+            // tell players about the end of the game
+            for (Player player : players) {
+                player.onGameOver();
+            }
+
             return new GameStats(gameID, players.length, state.getScore(), state.getLives(), moves, state.getInfomation(), strikes);
         } catch (Exception ex) {
             logger.error("the game went bang", ex);

src/main/java/com/fossgalaxy/games/fireworks/ai/Agent.java

@@ -36,6 +36,7 @@ public interface Agent {
     default void receiveID(int agentID, String[] names) {
         receiveID(agentID);
     }
+    default void onGameOver(int agentID, GameState state){ }
 
     @Deprecated
     default void receiveID(int agentID) {

src/main/java/com/fossgalaxy/games/fireworks/ai/AgentPlayer.java

@@ -88,6 +88,11 @@ public class AgentPlayer implements Player {
         policy.receiveID(id, names);
     }
 
+    @Override
+    public void onGameOver() {
+        policy.onGameOver(playerID, state.getCopy());
+    }
+
     @Override
     public String getName() {
         return name;

src/main/java/com/fossgalaxy/games/fireworks/players/Player.java

 package com.fossgalaxy.games.fireworks.players;
 
+import com.fossgalaxy.games.fireworks.state.GameState;
 import com.fossgalaxy.games.fireworks.state.GameType;
 import com.fossgalaxy.games.fireworks.state.actions.Action;
 import com.fossgalaxy.games.fireworks.state.events.GameEvent;