feat: Adds KR/EC client versions (No actual support yet). (#1506)

### Summary

- Adds KR/EC client versions to ClientVersion
- Adds distinction for enhanced versions in the page queue
- Adds KR Expansion flags
- Adds ProtocolChange enum support
- Adds missing Moongate checks for TerMur
- Adds better message for why a client version is not supported, and which ones are supported.

Projects/UOContent/Spells/Base/Spell.cs

@@ -455,8 +455,6 @@ namespace Server.Spells
             }
         }
 
-        private static ClientVersion _insufficientManaClientChange = new ClientVersion("7.0.65.4");
-
         public bool Cast()
         {
             StartCastTime = Core.TickCount;
@@ -577,7 +575,7 @@ namespace Server.Spells
                         return true;
                     }
                 }
-                else if (Caster.NetState?.Version >= _insufficientManaClientChange)
+                else if (Caster.NetState?.IsKRClient != true && Caster.NetState?.Version >= ClientVersion.Version70654)
                 {
                     // Insufficient mana. You must have at least ~1_MANA_REQUIREMENT~ Mana to use this spell.
                     Caster.LocalOverheadMessage(MessageType.Regular, 0x22, 502625, requiredMana.ToString());