Add auction filtering and sorting system

New files:
- EnumAuctionSort: Sorting options (price, time, name, bids, etc.)
- AuctionFilter: Search/filter criteria with builder pattern
- AuctionDataPacket: Large packet for server->client listing data

AuctionController changes:
- getFilteredListings(): Main filtering/pagination method
- sortListings(): Comprehensive sorting by various criteria
- quickSearch(): Convenience method for simple searches
- FilterResult: Pagination result container

AuctionListing changes:
- Added bidCount field with NBT persistence
- Added creationTime alias methods

AuctionActionPacket changes:
- QueryListings: Filter-based search
- QueryMyListings: Player's own listings
- QueryMyBids: Player's active bids
- QueryClaimable: Items ready to claim

NoppesUtil changes:
- Auction data storage and IAuctionData interface
- Client-side data handling for GUI integration

src/main/java/kamkeel/npcs/network/PacketHandler.java

@@ -36,6 +36,7 @@ import kamkeel.npcs.network.packets.data.gui.GuiWaypointPacket;
 import kamkeel.npcs.network.packets.data.gui.IsGuiOpenPacket;
 import kamkeel.npcs.network.packets.data.large.GuiDataPacket;
 import kamkeel.npcs.network.packets.data.large.PartyDataPacket;
+import kamkeel.npcs.network.packets.data.large.AuctionDataPacket;
 import kamkeel.npcs.network.packets.data.large.ScrollDataPacket;
 import kamkeel.npcs.network.packets.data.large.ScrollListPacket;
 import kamkeel.npcs.network.packets.data.large.SyncEffectPacket;
@@ -551,6 +552,7 @@ public class PacketHandler {
         DATA_PACKET.registerPacket(new SyncEffectPacket());
         DATA_PACKET.registerPacket(new GuiDataPacket());
         DATA_PACKET.registerPacket(new PartyDataPacket());
+        DATA_PACKET.registerPacket(new AuctionDataPacket());
     }
 
     public void registerPlayerPackets() {