Core/Scripts: Archmage Arugal event script (#17922)

Implement boss script for Archmage Arugal
- add yells used in boss event to DB
- use proper spells instead of only melee fighting
- add DataType in shadowfang_keep.h
- add event scheduling in the script

By Riztazz
Closes issue #17916

sql/updates/world/3.3.5/2016_11_03_01_world_335.sql

@@ -0,0 +1,12 @@
+-- Archmage Arugal, NPC entry 4275
+SET @Arugal := 4275;
+
+UPDATE `creature_template` SET `ScriptName` = 'boss_archmage_arugal' WHERE `entry`= @Arugal;
+
+UPDATE `creature_text` SET `comment`= 'Archmage Arugal - Fenrus the Devourer dies' WHERE `entry`= @Arugal AND `groupid`= 0;
+
+DELETE FROM `creature_text` WHERE `entry` = @Arugal AND `groupid` IN (1,2,3);
+INSERT INTO `creature_text` (`entry`,`groupid`,`id`,`text`,`type`,`language`,`probability`,`emote`,`duration`,`sound`,`BroadcastTextId`,`TextRange`, `comment`) VALUES 
+(@Arugal,1,0,'You, too, shall serve!', 14,0,100,0,0,0,6115,0,'Archmage Arugal - Aggro'),
+(@Arugal,2,0,'Release your rage!',     14,0,100,0,0,0,6535,0,'Archmage Arugal - Transforms player into a Worgen'),
+(@Arugal,3,0,'Another falls!',         14,0,100,0,0,0,6116,0,'Archmage Arugal - Killing a player');