Add inventory gather and sort

src/common/Edelstein.Common.Gameplay.Game/Handling/Packets/UserGatherItemRequestHandler.cs

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+using Edelstein.Common.Gameplay.Handling;
+using Edelstein.Protocol.Gameplay.Game;
+using Edelstein.Protocol.Gameplay.Game.Contracts.Packets.Recv;
+using Edelstein.Protocol.Gameplay.Handling;
+using Edelstein.Protocol.Network.Packets;
+using Edelstein.Protocol.Utilities.Pipelines;
+
+namespace Edelstein.Common.Gameplay.Game.Handling.Packets;
+
+public class UserGatherItemRequestHandler(
+    IPipeline<PipedPacketMessage<IGameStageSystem, IGameStageSystemUser, UserGatherItemRequest>> pipeline
+) : PipedPacketHandler<IGameStageSystem, IGameStageSystemUser, UserGatherItemRequest>(
+    (short)PacketRecvOperation.UserGatherItemRequest,
+    pipeline
+);

src/common/Edelstein.Common.Gameplay.Game/Handling/Packets/UserSortItemRequestHandler.cs

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+using Edelstein.Common.Gameplay.Handling;
+using Edelstein.Protocol.Gameplay.Game;
+using Edelstein.Protocol.Gameplay.Game.Contracts.Packets.Recv;
+using Edelstein.Protocol.Gameplay.Handling;
+using Edelstein.Protocol.Network.Packets;
+using Edelstein.Protocol.Utilities.Pipelines;
+
+namespace Edelstein.Common.Gameplay.Game.Handling.Packets;
+
+public class UserSortItemRequestHandler(
+    IPipeline<PipedPacketMessage<IGameStageSystem, IGameStageSystemUser, UserSortItemRequest>> pipeline
+) : PipedPacketHandler<IGameStageSystem, IGameStageSystemUser, UserSortItemRequest>(
+    (short)PacketRecvOperation.UserSortItemRequest,
+    pipeline
+);

src/common/Edelstein.Common.Gameplay.Game/Handling/Pipes/UserOnPacketUserGatherItemRequest.cs

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+using System.Threading.Tasks;
+using Edelstein.Protocol.Gameplay.Game.Contracts.Packets.Recv;
+using Edelstein.Protocol.Gameplay.Game.Contracts.Packets.Send;
+using Edelstein.Protocol.Gameplay.Game.Objects.Users;
+using Edelstein.Protocol.Utilities.Pipelines;
+
+namespace Edelstein.Common.Gameplay.Game.Handling.Pipes;
+
+public class UserOnPacketUserGatherItemRequest : AbstractUserOnPacketInField<UserGatherItemRequest>
+{
+    protected override async Task HandleAfter(IPipelineContext ctx, PipedFieldPacketMessage<UserGatherItemRequest> message)
+    {
+        await message.User.ModifyInventory(i => i[message.Packet.Type]?.Gather(), true);
+        await message.User.Dispatch(new GatherItemResult
+        {
+            Type = message.Packet.Type
+        });
+    }
+}

src/common/Edelstein.Common.Gameplay.Game/Handling/Pipes/UserOnPacketUserSortItemRequest.cs

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+using System.Threading.Tasks;
+using Edelstein.Protocol.Gameplay.Game.Contracts.Packets.Recv;
+using Edelstein.Protocol.Gameplay.Game.Contracts.Packets.Send;
+using Edelstein.Protocol.Gameplay.Game.Objects.Users;
+using Edelstein.Protocol.Utilities.Pipelines;
+
+namespace Edelstein.Common.Gameplay.Game.Handling.Pipes;
+
+public class UserOnPacketUserSortItemRequest : AbstractUserOnPacketInField<UserSortItemRequest>
+{
+    protected override async Task HandleAfter(IPipelineContext ctx, PipedFieldPacketMessage<UserSortItemRequest> message)
+    {
+        await message.User.ModifyInventory(i => i[message.Packet.Type]?.Sort(), true);
+        await message.User.Dispatch(new SortItemResult
+        {
+            Type = message.Packet.Type
+        });
+    }
+}

src/protocol/Edelstein.Protocol.Gameplay.Game/Contracts/Packets/Recv/UserGatherItemRequest.cs

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+using BinarySerialization;
+using Edelstein.Protocol.Gameplay.Entities.Inventories;
+using Edelstein.Protocol.Network.Packets;
+
+namespace Edelstein.Protocol.Gameplay.Game.Contracts.Packets.Recv;
+
+public record UserGatherItemRequest : StructuredRecvPacket
+{
+    [FieldOrder(0)] public int UpdateTime { get; init; }
+    [FieldOrder(1)] public ItemInventoryType Type { get; init; }
+}

src/protocol/Edelstein.Protocol.Gameplay.Game/Contracts/Packets/Recv/UserSortItemRequest.cs

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+using BinarySerialization;
+using Edelstein.Protocol.Gameplay.Entities.Inventories;
+using Edelstein.Protocol.Network.Packets;
+
+namespace Edelstein.Protocol.Gameplay.Game.Contracts.Packets.Recv;
+
+public record UserSortItemRequest : StructuredRecvPacket
+{
+    [FieldOrder(0)] public int UpdateTime { get; init; }
+    [FieldOrder(1)] public ItemInventoryType Type { get; init; }
+}

src/protocol/Edelstein.Protocol.Gameplay.Game/Contracts/Packets/Send/GatherItemResult.cs

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+using BinarySerialization;
+using Edelstein.Protocol.Gameplay.Entities.Inventories;
+using Edelstein.Protocol.Network.Packets;
+
+namespace Edelstein.Protocol.Gameplay.Game.Contracts.Packets.Send;
+
+public record GatherItemResult() : StructuredSendPacket((short)PacketSendOperation.GatherItemResult)
+{
+    [FieldOrder(0)] public byte Unk1 { get; init; }
+    [FieldOrder(1)] public required ItemInventoryType Type { get; init; }
+}

src/protocol/Edelstein.Protocol.Gameplay.Game/Contracts/Packets/Send/SortItemResult.cs

@@ -0,0 +1,11 @@
+using BinarySerialization;
+using Edelstein.Protocol.Gameplay.Entities.Inventories;
+using Edelstein.Protocol.Network.Packets;
+
+namespace Edelstein.Protocol.Gameplay.Game.Contracts.Packets.Send;
+
+public record SortItemResult() : StructuredSendPacket((short)PacketSendOperation.SortItemResult)
+{
+    [FieldOrder(0)] public byte Unk1 { get; init; }
+    [FieldOrder(1)] public required ItemInventoryType Type { get; init; }
+}