fix(core): Removes disposable netstates. (#467)

- [X] Removes IDisposable from NetState
- [X] Swaps Disconnect and Dispose methods

Projects/UOContent/Misc/ProfanityProtection.cs

@@ -99,7 +99,7 @@ namespace Server.Misc
                     return true;
                 case ProfanityAction.Disconnect:
                     {
-                        from.NetState?.Dispose();
+                        from.NetState?.Disconnect();
 
                         return false;
                     }