Core/Commands: Add .cast dest #spellid #x #y #z which orders selected unit to cast a spell at selected destination.

src/server/game/Chat/Chat.h

@@ -152,6 +152,7 @@ class ChatHandler
         bool HandleCastDistCommand(const char *args);
         bool HandleCastSelfCommand(const char *args);
         bool HandleCastTargetCommand(const char *args);
+        bool HandleCastDestCommand(const char *args);
 
         bool HandleCharacterCustomizeCommand(const char * args);
         bool HandleCharacterChangeFactionCommand(const char * args);