[LLS] Add core global definitions (luautils), clarify enums, and correct issues

[claywar]

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 luautils defintions for global functions accessible on the Lua side
• Renames enums defined to use the same explicit name as position in xi table (zone enum == xi.zone)
• Corrects issues identified by LLS from the above changes

Steps to test these changes

No impact to gameplay should be observed, CI should pass

[claywar]

Not sure whats going on with the Full Startup Windows check. Not throwing any errors up when testing locally on Windows, and seems is getting a nil return from a luautils binding (which shouldn't be possible)

[claywar]

Aha! so when the --load_all parameter is used with xi_map, everything is cached, including spec files. Latest commit adds a chunk to ignore items in that directory in this CI case