Allows one to spawn with a backup implant. Rather than requiring it to be obtained literally every single time you spawn, you can just spawn with one instead, if you don't want to go to medical!
ICly there's no real reason why you would get your implant removed every shift, and OOCly if for some reason we decide to make resleeving not possible one shift, we're going to remove the resleevers, not the implants, so this should only really affect people who don't like getting implants every shift, and should make things a little less stressful for medical.
Tested on my test server and nothing appeared to be broken. Overlays were showing up as expected.
Ghosts no longer became space/stairs/stole someone's tail
Artifacts used to be confined to about one Z level: The mining asteroid.
Now with there being a LOT more Z levels, this number really hasn't changed and it means that artifacts are harder to find, being spread across many more Z levels.
This could mean that if you had bad RNG, you would have 6 artifacts spread across every Z level, meaning xenoarch would very quickly exhaust the possible artifacts they had nearby and after exploring every Z level that spawns artifacts, they'd only have 6 artifacts.
This doubles that number so now there is 12 artifacts that spawn by default, up to 24.
Meanwhile, roguemining would spawn 6 to 12 artifacts per mining area visited. This meant each rogue mining area had as many artifacts as the entire universe had. This was obviously unintended, so this fixed that by lowering it to 0 or 1 artifact per roguemining Z level.
