Implement missing ITEM_AGREE packet handler

EOLib/PacketHandlers/Items/ItemAgreeHandler.cs

@@ -0,0 +1,32 @@
+using AutomaticTypeMapper;
+using EOLib.Domain.Character;
+using EOLib.Domain.Login;
+using EOLib.Net.Handlers;
+using Moffat.EndlessOnline.SDK.Protocol.Net;
+using Moffat.EndlessOnline.SDK.Protocol.Net.Server;
+
+namespace EOLib.PacketHandlers.Items
+{
+    [AutoMappedType]
+    public class ItemAgreeHandler : InGameOnlyPacketHandler<ItemAgreeServerPacket>
+    {
+        private readonly ICharacterInventoryRepository _characterInventoryRepository;
+
+        public override PacketFamily Family => PacketFamily.Item;
+
+        public override PacketAction Action => PacketAction.Agree;
+
+        public ItemAgreeHandler(IPlayerInfoProvider playerInfoProvider,
+                                ICharacterInventoryRepository characterInventoryRepository)
+            : base(playerInfoProvider)
+        {
+            _characterInventoryRepository = characterInventoryRepository;
+        }
+
+        public override bool HandlePacket(ItemAgreeServerPacket packet)
+        {
+            _characterInventoryRepository.ItemInventory.RemoveWhere(x => x.ItemID == packet.ItemId);
+            return true;
+        }
+    }
+}