fix: Fixes crashing due to bad packet assumptions. (#1829)

### Summary
- Fixes various exploits that can crash the shard when the client misbehaves.
- Clients will now be disconnected if they send packets that are marked as out of game only (new flag), while they are in-game.


> [!Note]
> **Developer Note**
> Added an `OutOfGameOnly` which should be used to flag packets as only available out of the game.
> This is the opposite of, yet not the converse to `InGameOnly`.

Projects/UOContent/Network/Packets/IncomingItemPackets.cs

@@ -26,7 +26,7 @@ public static class IncomingItemPackets
     public static unsafe void Configure()
     {
         IncomingPackets.Register(0x07, 7, true, &LiftReq);
-        IncomingPackets.Register(new ContainerGridPacketHandler(0x08, 14, true, &DropReq));
+        IncomingPackets.Register(new ContainerGridPacketHandler(0x08, 14, &DropReq));
         IncomingPackets.Register(0x13, 10, true, &EquipReq);
         IncomingPackets.Register(0xEC, 0, false, &EquipMacro);
         IncomingPackets.Register(0xED, 0, false, &UnequipMacro);