fix(core): Tightens the network stack (#479)

- [X] Removes network pause/resume
- [X] Adds back packet profiler
- [X] Adds state machine to keep track and trace netstates
- [X] Changes NetState.Running back to using an interlock exchange
- [X] Adds preliminary packet throttling support


### Packet Throttling
- `[GetThrottle <packetId>` to get the delay in milliseconds for that packet
- `[SetThrottle <packetId> <delay>` to set the delay in milliseconds for that packet
The settings are saved to `Configuration/throttles.json`

Projects/Server/Network/PacketHandler.cs

@@ -4,7 +4,7 @@ namespace Server.Network
 {
     public delegate void OnPacketReceive(NetState state, CircularBufferReader reader, ref int packetLength);
 
-    public delegate TimeSpan ThrottlePacketCallback(NetState state);
+    public delegate bool ThrottlePacketCallback(int packetId, NetState state, out bool drop);
 
     public class PacketHandler
     {