[lua] TOAU Mission 5 Quest IF Adjustments

[slashtangent]

I affirm:

• I understand that if I do not agree to the following points by completing the checkboxes my PR will be ignored.
• I understand I should leave resolving conversations to the LandSandBoat team so that reviewers won't miss what was said.
• I have read and understood the Contributing Guide and the Code of Conduct.
• I have tested my code and the things my code has changed since the last commit in the PR and will test after any later commits.

What does this pull request do?

Adds missing interactions as observed in captures.

Adds interaction in San d'Oria if the player is on TOAU Mission 5 but does NOT have access to the Chateau.

• Force zones the player into the Chateau
• Force starts the cs with Halver
• Force zones the player out when complete

Steps to test these changes

!addmission 4 4
Interact with the NPCs.
!setplayernation <me> 2
!addmission 2 0
!addkeyitem RAILLEFALS_LETTER
!zone <Northern San 'Doria>
Talk to Guilerme.

Captures

No Chateau interaction is packets only and included in the zip.
https://youtu.be/nt_N82kVSR0
https://drive.google.com/file/d/1lpcibJSs_Qhs49eiN9pLy3BasCxcXOSW/view?usp=sharing