DB/Creature: Fix Veridian Broodling

By Pitcrawler, closes #8990
SQL: Sync auth_database
Core/AuctionHouse: Merge last changes of PR #12917

Merge last changes of PR #12917 and fix a NULL dereference crash
Scripts/Ulduar: Implement Mimiron

Closes #12894
Fixes #7652
Fixes #4736

Signed-off-by: DDuarte <dnpd.dd@gmail.com>
Core/Misc: Remove unneeded NULL checks
Scripts/Commands: Implement .guild info command

Displays a information summary about the selected player guild or a given guildId or Name