Core/Items: Implemented AzeriteItem

Port From (https://github.com/TrinityCore/TrinityCore/commit/ab6ae44b638136665e2ae6c6a434ad7426621c39)

Source/Framework/Constants/ItemConst.cs

@@ -829,6 +829,11 @@ namespace Framework.Constants
         Unk26 = 0x80000000 // ?
     }
 
+    public enum ItemFieldFlags2
+    {
+        HeartOfAzerothEquipped = 0x1
+    }
+
     public enum ItemFlags : long
     {
         NoPickup = 0x01,
@@ -1141,6 +1146,7 @@ namespace Framework.Constants
         JusticePoints = 395,
         ValorPoints = 396,
         ApexisCrystals = 823,
+        Azerite = 1553
     }
 
     public enum PlayerCurrencyState

Source/Framework/Constants/PlayerConst.cs

@@ -64,6 +64,11 @@ namespace Framework.Constants
         public const int MaxHonorLevel = 500;
         public const byte LevelMinHonor = 110;
         public const uint SpellPvpRulesEnabled = 134735;
+
+        //Azerite
+        public const uint ItemIdHeartOfAzeroth = 158075;
+        public const uint MaxAzeriteItemLevel = 70;
+        public const uint MaxAzeriteItemKnowledgeLevel = 30;
     }
 
     public struct MoneyConstants