Adds new sprites for some guns, consolidates _vr file [IDB IGNORE] (#18306)

* Adds new sprites for some guns, consolidates _vr file

CHANGED:
Captains laser new sprite: https://i.imgur.com/LbelowO.png
Energy gun new sprite: https://i.imgur.com/0KSAIEW.png
Nagant new sprite: https://i.imgur.com/6BtQdO6.png
Makarov new sprite: https://i.imgur.com/ojBjcwb.png
SecGun new sprite: https://i.imgur.com/snhIhB7.png
StunRevolver new sprite: https://i.imgur.com/2Iy29CH.png (The vintage stun revolver still exists, so the old sprite is still accessible)

* Shrink netgun

code/modules/mob/living/silicon/robot/dogborg/dog_weapons.dm

@@ -30,7 +30,6 @@
 	fire_delay = 6
 	force = 5
 	icon_state = "medbeam"
-	icon = 'icons/obj/gun_vr.dmi'
 	accuracy = 100
 	fire_sound = 'sound/weapons/eluger.ogg'
 	self_recharge = 1
@@ -66,7 +65,6 @@
 	name = "EW26 Artemis Mounted"
 	desc = "The RayZar EW26 Artemis, also known as the 'phase carbine', is a downsized energy-based weapon specifically designed for use against wildlife. This one has a safety interlock that prevents firing while in proximity to the facility."
 	description_fluff = "RayZar is Ward-Takahashi’s main consumer weapons brand, known for producing and licensing a wide variety of specialist energy weapons of various types and quality primarily for the civilian market."
-	icon = 'icons/obj/gun.dmi'
 	icon_state = "phasecarbine"
 	charge_cost = 160
 	recharge_time = 16