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/Skills/AntiMacroSystem.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
-using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using System.Text.Json.Serialization;
 using Server.Collections;