[3.3.5] ChatCommands, the other half: chat command resolution refactor (PR #25463)

(cherry picked from commit 1eca51b417)

sql/updates/world/master/2022_02_27_06_world_2020_09_20_00_world.sql

@@ -0,0 +1,10 @@
+-- 
+DELETE FROM `trinity_string` WHERE `entry` IN (6,7,8,191,192,193,194);
+INSERT INTO `trinity_string` (`entry`,`content_default`) VALUES
+(6, 'Command \'%.*s\' does not exist'),
+(7, 'Subcommand \'%.*s\' is ambiguous:'),
+(8, 'Possible subcommands:'),
+(191, '|- %.*s'),
+(192, '|- %.*s ...'),
+(193, 'Subcommand \'%.*s\' does not exist.'),
+(194, 'Command \'%.*s\' is ambiguous:');