Corrects 200+ instances of "it's" where it should've been "its" instead (#85169)

## About The Pull Request

it's - conjunction of "it" and "is"
its - possessive form of "it"

grammar is hard, and there were a lot of places where "it's" was used
where it shouldn't have been. i went and painstakingly searched the
entire repository for these instances, spending a few hours on it. i
completely ignored the changelog archive, and i may have missed some
outliers. most player-facing ones should be corrected, though
## Why It's Good For The Game
proper grammar is good

## Changelog
🆑
spellcheck: Numerous instances of "it's" have been properly replaced
with "its"
/🆑

code/modules/modular_computers/file_system/programs/powermonitor.dm

@@ -42,7 +42,7 @@
 	attached_wire_ref = WEAKREF(locate(/obj/structure/cable) in T)
 	if(attached_wire_ref)
 		return
-	var/area/A = get_area(computer) //if the computer isn't directly connected to a wire, attempt to find the APC powering it to pull it's powernet instead
+	var/area/A = get_area(computer) //if the computer isn't directly connected to a wire, attempt to find the APC powering it to pull its powernet instead
 	if(!A)
 		return
 	var/obj/machinery/power/apc/local_apc = A.apc