Combat Mechs Can Punch More Things (#6303)

* Combat Mechs Can Punch More Things

Removes the var to check for the 5 things it can attack, instead it can punch anything (but not everything will take damage).

Gives punching objects a check so you don't accidently smash something without meaning to.

Gives closets and canisters a proc to take_damage so they'll actually get smashed by the mechs.

* Take_Damage Boogaloo

* More take_damage Stuff

Adds click delay on attacking barriers.
Proper noises when attacking material doors and barricades.

More stuff can be broken by mech punch and simple mobs.

* Adds changelong

* usr to user

code/game/objects/structures/inflatable.dm

@@ -137,6 +137,13 @@
 		user.visible_message("<span class='danger'>[user] [attack_verb] at [src]!</span>")
 	return 1
 
+/obj/structure/inflatable/take_damage(var/damage)
+	health -= damage
+	if(health <= 0)
+		visible_message("<span class='danger'>The [src] deflates!</span>")
+		spawn(1) puncture()
+	return 1
+
 /obj/item/inflatable/door/
 	name = "inflatable door"
 	desc = "A folded membrane which rapidly expands into a simple door on activation."