fix(DB/Command): Add help options for .spy command (#1339)

Add missing help options for the new .spy command

data/sql/updates/pending_db_world/rev_1548117070754986000.sql

@@ -0,0 +1,10 @@
+INSERT INTO `version_db_world` (`sql_rev`) VALUES ('1548117070754986000');
+
+DELETE FROM `command` WHERE `name` IN ('spy follow', 'spy unfollow', 'spy groupfollow', 'spy groupunfollow', 'spy clear', 'spy status');
+INSERT INTO `command` (`name`,`security`,`help`) VALUES
+('spy follow',          2, 'Syntax: .spy follow $name\nStart reading all the private conversations from that player.'),
+('spy unfollow',        2, 'Syntax: .spy unfollow $name\nStop reading private messages from that player.'),
+('spy groupfollow',     3, 'Syntax: .spy groupfollow $name\nStart reading all the private conversations from that player and from his current party.'),
+('spy groupunfollow',   3, 'Syntax: .spy groupunfollow $name\nStop reading private messages from that player\'s party.'),
+('spy clear',           2, 'Syntax: .spy clear\nClear your current spying list, removing every player from it.'),
+('spy status',          2, 'Syntax: .spy status\nShow your current spying list.');