Core/Spells: Implemented SPELL_ATTR1_CAST_WHEN_LEARNED

Port From (https://github.com/TrinityCore/TrinityCore/commit/747da1f804a05462fb0d542a9570f27a549688dc)

Source/Framework/Constants/Spells/SpellConst.cs

@@ -1642,7 +1642,7 @@ namespace Framework.Constants
         DontDisplayInAuraBar = 0x10000000, // 28 Client Doesn'T Display These Spells In Aura Bar
         ChannelDisplaySpellName = 0x20000000, // 29 Spell Name Is Displayed In Cast Bar Instead Of 'Channeling' Text
         EnableAtDodge = 0x40000000, // 30 Overpower
-        Unk31 = 0x80000000  // 31
+        CastWhenLearned = 0x80000000  // 31
     }
     public enum SpellAttr2 : uint
     {

Source/Game/Entities/Player/Player.Spells.cs

@@ -2542,6 +2542,8 @@ namespace Game.Entities
                 CastSpell(this, spellId, true);
                 return false;
             }
+            else if (spellInfo.HasAttribute(SpellAttr1.CastWhenLearned))
+                CastSpell(this, spellId, true);
 
             // update free primary prof.points (if any, can be none in case GM .learn prof. learning)
             uint freeProfs = GetFreePrimaryProfessionPoints();