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/modules/shieldgen/energy_field.dm

@@ -60,6 +60,9 @@
 		user.do_attack_animation(src)
 		user.setClickCooldown(user.get_attack_speed())
 
+/obj/effect/energy_field/take_damage(var/damage)
+	adjust_strength(-damage / 20)
+
 /obj/effect/energy_field/attack_hand(var/mob/living/user)
 	impact_effect(3) // Harmless, but still produces the 'impact' effect.
 	..()