Add PlayerFinishDungeonEvent

src/main/java/emu/grasscutter/server/event/player/PlayerFinishDungeonEvent.java

@@ -0,0 +1,17 @@
+package emu.grasscutter.server.event.player;
+
+import emu.grasscutter.game.dungeons.DungeonManager;
+import emu.grasscutter.game.player.Player;
+import emu.grasscutter.game.world.Scene;
+import emu.grasscutter.server.event.Event;
+import lombok.*;
+
+import java.util.List;
+
+@Getter
+@RequiredArgsConstructor
+public final class PlayerFinishDungeonEvent extends Event {
+    private final List<Player> players;
+    private final Scene dungeon;
+    private final DungeonManager manager;
+}