chore: run vacant check on player leave

Author: Swofty-Developments

type.island/src/main/java/net/swofty/type/island/events/traditional/ActionIslandSave.java

@@ -0,0 +1,22 @@
+package net.swofty.type.island.events.traditional;
+
+import lombok.SneakyThrows;
+import net.minestom.server.event.player.PlayerDisconnectEvent;
+import net.swofty.type.generic.event.EventNodes;
+import net.swofty.type.generic.event.HypixelEvent;
+import net.swofty.type.generic.event.HypixelEventClass;
+import net.swofty.type.skyblockgeneric.user.SkyBlockIsland;
+import net.swofty.type.skyblockgeneric.user.SkyBlockPlayer;
+
+public class ActionIslandSave implements HypixelEventClass {
+
+    @SneakyThrows
+    @HypixelEvent(node = EventNodes.PLAYER, requireDataLoaded = false)
+    public void run(PlayerDisconnectEvent event) {
+        SkyBlockPlayer player = (SkyBlockPlayer) event.getPlayer();
+        SkyBlockIsland island = player.getSkyBlockIsland();
+        if (island != null) {
+            island.runVacantCheck();
+        }
+    }
+}