## About The Pull Request
Fixes#74842
So this issue is multi-part
1. Separatist antag datum used the wrong mob for applying laws to.
`mob_override` is not passed usually and should default to the antag
datum owner's mob if not passed
Fixes this by passing the right mob. AI still doesn't get law datums,
the issue is deeper - they don't even become separatists!
2. Separatists only iterates over human mobs, and not silicon mobs
Okay, fixes this by iterating over all living players. Still not
entirely fixed, new AIs don't have UN laws!
3. Changes the default law datum when nations executes to United Nations
so new unlinked silicons gain the lawset
Closer, would you believe it if this still doesn't fix everything, but
going further is out of scope.
Changing the round default lawset as a part of roundstart execution does
not update anything that set it from atom initialize. If we wanted we
could hook signals into "default lawset changed" and then update it
conditionally to circumvent ALL of these issues but whatever, someone
can do that later.
## Why It's Good For The Game
AIs stop crying on nations
## Changelog
🆑 Melbert
fix: AIs now get their proper lawset, and an objective related to said
lawset, on Nations
/🆑
1521b4b124