fix: Fixes stalled connections and infinite throttle (#1796)

> [!Warning]
> **Developer Warning**
> The `PacketThrottle` callback return value is now reversed. `true` indicates the connection is _throttled_.

### Summary
- Fixes an issue where connections get stalled forever
- Fixes an issue where the throttler is not working properly
- Removes account attack limiter
- Rewrites IP limiter
- Removes IP restrictions (they weren't used, and not practical)
- Fixes issue where IP limiter was counting before firewall was blocking.

View without whitespace:
https://github.com/modernuo/ModernUO/pull/1796/files?diff=split&w=1

Projects/UOContent/Accounting/AccountHandler.cs

@@ -369,11 +369,6 @@ public static class AccountHandler
 
             acct.LogAccess(e.State);
         }
-
-        if (!e.Accepted)
-        {
-            AccountAttackLimiter.RegisterInvalidAccess(e.State);
-        }
     }
 
     public static void EventSink_GameLogin(GameLoginEventArgs e)
@@ -409,11 +404,6 @@ public static class AccountHandler
             e.Accepted = true;
             e.CityInfo = CharacterCreation.GetStartingCities(acct.Young);
         }
-
-        if (!e.Accepted)
-        {
-            AccountAttackLimiter.RegisterInvalidAccess(e.State);
-        }
     }
 
     public static bool CheckAccount(Mobile mobCheck, Mobile accCheck)