IPC battery rework, ion rifle nerf, surge damage. (#10245)

- EMPs no longer deal permanent damage. Instead, they deal a temporary kind of damage called surge damage, that lasts for 10 seconds at maximum.
  - Surge damage makes mechanical or assisted limbs count as broken and nonfunctional.
  - Surge damage has special interactions with the mechanical heart and eyes.
  - EMP damage is no longer randomized. It is now much more consistent.
  - IPC battery is no longer represented as nutrition. Instead, the microbattery organ contains a super-capacity cell that is used for all their actions. This is represented with a new HUD icon.
  - Hardsuits can now be charged in robot chargers if you are wearing them.
  - Ion bolts now have a hit sound.
  - Removed the ion rifle lethal mode.
  - The ion rifle now has four shots.

code/game/objects/items/devices/flash.dm

@@ -178,7 +178,8 @@
 	return
 
 /obj/item/device/flash/emp_act(severity)
-	if(broken)	return
+	if(broken)
+		return
 	flash_recharge()
 	switch(times_used)
 		if(0 to 5)
@@ -187,13 +188,10 @@
 				icon_state = "flashburnt"
 				return
 			times_used++
-			if(istype(loc, /mob/living/carbon))
+			if(iscarbon(loc))
 				var/mob/living/carbon/M = loc
-				var/safety = M.eyecheck(TRUE)
-				if(safety < FLASH_PROTECTION_MODERATE)
-					M.flash_eyes()
-					for(var/mob/O in viewers(M, null))
-						O.show_message("<span class='disarm'>[M] is blinded by the flash!</span>")
+				M.flash_eyes()
+				to_chat(M, SPAN_WARNING("Your [name] goes off!"))
 	..()
 
 /obj/item/device/flash/synthetic