Core/Gossip: New AddMenuItem method for using DB texts

Many thanks to @Erimioa
DB/Triggers: Added some missing trigger teleportation in the Ebon Hold.
Clearify the guild limitation message on world server initation (3.3.5a withdrawal cap; 4.3.4 withdrawal and guild rep cap)
Merge pull request #9612 from Ascathor/master

Clearify the guild limitation message on world server initation
DB/Quests: Fix Ursoc, the Bear God, closes #3165 #9535
DB/SAI: Convert a core script to SAI. Fixes issues when abandoning the quest.

Thanks @dr-j for the initial work.
DB/Quests: Fix Bringing Down Heb'Jin, closes #376
Merge remote-tracking branch 'refs/remotes/upstream/master'