fix: Overhauls virtue system (#1376)

## MAJOR CHANGE (API BREAKING)

Moved the virtues to it's own system _VirtueSystem_. This should make it easier to extend or remove the virtue system. Virtues will be saved to a new folder called _Virtues_.

### Motivation

The motivation was also two-fold, performance/stability, and to fix bugs.

First, virtues is the second system (first is murders), that has a pre-world-save check on _every mobile in the game_ to atrophy virtue stats. This is taxing since it freexes the world and makes world saves take longer. Every mobile had Gain/Loss dates for each virtue, whether they needed them or not. Most players don't even use the virtue system, so this will increase performance considerably.

Second, when I tried to optimize/refactor the code, I found several bugs that needed to be fixed.

### Major API Changes

- [X] The properties on players related to virtues are gone. Use `pm.GetVirtues()?.<PropertyName>` instead.
- [X] Virtues were removed from non-player Mobiles.
- [X] `pm.JusticeProtectors` was removed. Use `JusticeVirtue.GetProtector()` or `JusticeVirtue.GetProtected()` instead.

### Screenshots

<img width="221" alt="Props-1" src="https://github.com/modernuo/ModernUO/assets/3953314/5c09cb83-b8d5-44a2-b899-a7ed7cd736ac">
<img width="220" alt="props-2" src="https://github.com/modernuo/ModernUO/assets/3953314/aeade4d3-8df0-47bd-955a-a864d0946cf7">

Projects/UOContent/Network/Packets/IncomingPlayerPackets.cs

@@ -16,8 +16,10 @@
 using System.Diagnostics;
 using Microsoft.Toolkit.HighPerformance;
 using Server.Diagnostics;
+using Server.Engines.Virtues;
 using Server.Exceptions;
 using Server.Gumps;
+using Server.Mobiles;
 
 namespace Server.Network;
 
@@ -184,7 +186,7 @@ public static class IncomingPlayerPackets
                 {
                     var virtueID = Utility.ToInt32(command) - 1;
 
-                    EventSink.InvokeVirtueMacroRequest(from, virtueID);
+                    VirtueGump.RequestVirtueMacro((PlayerMobile)from, virtueID);
 
                     break;
                 }
@@ -460,11 +462,11 @@ public static class IncomingPlayerPackets
 
             if (buttonID == 1 && switchCount > 0)
             {
-                var beheld = World.FindMobile((Serial)reader.ReadUInt32());
+                var beheld = World.FindEntity<PlayerMobile>((Serial)reader.ReadUInt32());
 
                 if (beheld != null)
                 {
-                    EventSink.InvokeVirtueGumpRequest(state.Mobile, beheld);
+                    VirtueGump.RequestVirtueGump((PlayerMobile)state.Mobile, beheld);
                 }
             }
             else
@@ -473,7 +475,7 @@ public static class IncomingPlayerPackets
 
                 if (beheld != null)
                 {
-                    EventSink.InvokeVirtueItemRequest(state.Mobile, beheld, buttonID);
+                    VirtueGump.RequestVirtueItem((PlayerMobile)state.Mobile, beheld, buttonID);
                 }
             }
         }