[lua] ENM Pulling the Strings framework

[Skold177]

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 experimental framework for the ENM "Pulling the Strings"

• Restricts entry to 1 member at level 60 with no subjob.
• Restricts DNC, SCH, RUN & GEO from registering for the battlefield.
• Stores initiators job into a battlefield variable so it can be used in future PRs.
• Creates and generates loot pools based off the initiators job, with an additional attachment chance if their job is PUP.

Steps to test these changes

Run Pulling the Strings as any pre-WOTG job, see that the correct loot table drops. Try to run on DNC/SCH/RUN/GEO, be denied entry.