Add Disconnect to Client and Server

TicTacToe.csproj

@@ -65,6 +65,7 @@
     <Compile Include="scripts\net\Server.cs" />
     <Compile Include="scripts\net\syncing\PacketDistributor.cs" />
     <Compile Include="scripts\net\syncing\ConnectionHandler.cs" />
+    <Compile Include="scripts\util\DisconnectReason.cs" />
     <Compile Include="scripts\util\Optional.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />

scripts/net/Client.cs

@@ -38,5 +38,8 @@ namespace Network {
             GD.print("Connected to " + conn.Name + " at " + conn.Address + ":" + conn.Port);
             PacketDistributor.AddHandler(ServerConn);
         }
+
+        public override void Disconnected(Connection conn) {
+        }
     }
 }

scripts/net/Server.cs

@@ -31,5 +31,8 @@ namespace Network {
         public override void Connected(Connection conn) {
             GD.print("Someone connected at " + conn.Address + ":" + conn.Port);
         }
+
+        public override void Disconnected(Connection conn) {
+        }
     }
 }