[9656] Implement '.list talents' command.

Command show really know by selected player talent ranks,
including bugged cases like 2 rank same talent known and etc.
Also command claculated count of talents and total used talent
points cost of known talent ranks.

Can be helpful in bug debuging and cheating cases.

sql/updates/9656_01_mangos_command.sql

@@ -0,0 +1,5 @@
+ALTER TABLE db_version CHANGE COLUMN required_9651_01_mangos_quest_poi required_9656_01_mangos_command bit;
+
+DELETE FROM command WHERE name IN ('list talents');
+INSERT INTO command VALUES
+('list talents',3,'Syntax: .list talents\r\n\r\nShow list all really known (as learned spells) talent rank spells for selected player or self.');