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/Server/Network/PacketHandler.cs

@@ -21,11 +21,20 @@ public unsafe class PacketHandler
 {
     private readonly int _length;
 
-    public PacketHandler(int packetID, int length, bool ingame, delegate*<NetState, SpanReader, void> onReceive)
+    public PacketHandler(
+        int packetID, delegate*<NetState, SpanReader, void> onReceive,
+        int length = 0, bool inGameOnly = false, bool outGameOnly = false
+    ) : this(packetID, length, inGameOnly, outGameOnly, onReceive)
+    {
+
+    }
+
+    public PacketHandler(int packetID, int length, bool inGameOnly, bool outGameOnly, delegate*<NetState, SpanReader, void> onReceive)
     {
         _length = length;
         PacketID = packetID;
-        Ingame = ingame;
+        InGameOnly = inGameOnly;
+        OutOfGameOnly = outGameOnly;
         OnReceive = onReceive;
     }
 
@@ -37,5 +46,7 @@ public unsafe class PacketHandler
 
     public delegate*<int, NetState, bool> ThrottleCallback { get; set; }
 
-    public bool Ingame { get; }
+    public bool InGameOnly { get; }
+
+    public bool OutOfGameOnly { get; }
 }