Add IPacketHandler

TShockAPI/Handlers/IPacketHandler.cs

@@ -0,0 +1,16 @@
+namespace TShockAPI.Handlers
+{
+	/// <summary>
+	/// Describes a packet handler that receives a packet from a GetDataHandler
+	/// </summary>
+	/// <typeparam name="TEventArgs"></typeparam>
+	public interface IPacketHandler<TEventArgs> where TEventArgs : GetDataHandledEventArgs
+	{
+		/// <summary>
+		/// Invoked when the packet is received
+		/// </summary>
+		/// <param name="sender"></param>
+		/// <param name="args"></param>
+		void OnReceive(object sender, TEventArgs args);
+	}
+}