[lua] Abyssea - Main story quests Part 4

[Aeshur]

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 the following Abyssea main story quests:
The Wyrm God
Meanwhile, back on Abyssea

Clean up some files from Abyssea part 3 (removed unnecessary requires lines).

Sets up the Abyssea-Empyreal Paradox zone and future battlefield implementation:
Default actions
NPC functionality
IDs necessary for future battlefield implementation
Permanent Visitant status while in the zone as per wiki/captures

Does not include The Wyrm God battlefield.

Steps to test these changes

!addquest 8 184
!zone 255