Adds the Ha'rron MK.IV light tank (#5567)

This pr adds a tank, reserved for a future event and adminbus. Sprites were made by kyres1.
Adds some sounds to certain mecha actions, like loading crates or using a drill.
Ports padded caps from baystation.

code/modules/mob/living/carbon/human/human.dm

@@ -312,6 +312,7 @@
 // called when something steps onto a human
 // this handles mulebots and vehicles
 /mob/living/carbon/human/Crossed(var/atom/movable/AM)
+	..()
 	if(istype(AM, /obj/machinery/bot/mulebot))
 		var/obj/machinery/bot/mulebot/MB = AM
 		MB.RunOver(src)

code/modules/mob/living/living.dm

@@ -20,6 +20,11 @@
 	src.visible_message("<b>[src]</b> points to [A]")
 	return 1
 
+/mob/living/Crossed(var/atom/movable/AM)
+	if(istype(AM, /obj/mecha))
+		var/obj/mecha/MB = AM
+		MB.trample(src)
+
 /*one proc, four uses
 swapping: if it's 1, the mobs are trying to switch, if 0, non-passive is pushing passive
 default behaviour is:
@@ -307,7 +312,7 @@ default behaviour is:
 	return halloss
 
 /mob/living/proc/adjustHalLoss(var/amount)
-	if(status_flags & GODMODE)	
+	if(status_flags & GODMODE)
 		return 0
 
 	if(amount > 0)