Refactoring (#1660)

* Refactor a couple of iterators

* Use side-effect instead of second iterator

* Make World::onTick return shouldDelete instead of success

* Replace Shop iterator with side effects

* Scene

* Clean up Expeditions

* Refactor Expeditions

* Clean up Expeditions, Player

* Limit Expeditions by AR

* Lombokify props

Co-authored-by: AnimeGitB <AnimeGitB@bigblueball.in>

src/main/java/emu/grasscutter/server/packet/send/PacketGetWidgetSlotRsp.java

@@ -17,7 +17,7 @@ public class PacketGetWidgetSlotRsp extends BasePacket {
         GetWidgetSlotRspOuterClass.GetWidgetSlotRsp.Builder proto =
                 GetWidgetSlotRspOuterClass.GetWidgetSlotRsp.newBuilder();
 
-        if (player.getWidgetId() == null) {
+        if (player.getWidgetId() == 0) {  // TODO: check this logic later, it was null-checking an int before which made it dead code
             proto.addAllSlotList(List.of());
         } else {
             proto.addSlotList(