Core/Spells: SpellHistory updates

* Add duration override argument to StartCooldown (for cooldowns sent to client)
* Research new SMSG_SPELL_COOLDOWN flags
* Send interrupt school lockouts with newly defined SPELL_COOLDOWN_FLAG_LOSS_OF_CONTROL_UI
* Fixed packet structure of SMSG_MODIFY_COOLDOWN
* std::chorno-ification

src/server/game/Server/Packets/SpellPackets.cpp

@@ -613,6 +613,7 @@ WorldPacket const* WorldPackets::Spells::ModifyCooldown::Write()
     _worldPacket << int32(SpellID);
     _worldPacket << int32(DeltaTime);
     _worldPacket.WriteBit(IsPet);
+    _worldPacket.WriteBit(WithoutCategoryCooldown);
     _worldPacket.FlushBits();
 
     return &_worldPacket;