Refactors area stuff (#52751)

-bitfielded a bunch of bools on /area, I left some untouched cus they get called a lot
-Unused vars
-Fixed a var pretending to be a fake bool
-Probably more

code/modules/client/verbs/suicide.dm

@@ -242,7 +242,7 @@
 
 /mob/living/proc/canSuicide()
 	var/area/A = get_area(src)
-	if(A.block_suicide)
+	if(A.area_flags & BLOCK_SUICIDE)
 		to_chat(src, "<span class='warning'>You can't commit suicide here! You can ghost if you'd like.</span>")
 		return
 	switch(stat)