Holodeck Combat Training Arena Fix and Tweaks (#21603)

This PR maps in the combat training arena AREA into the map, allowing
for it to be actually spawned.

Also changed its layout and added in in two self recharging xenofauna
guns for people to shoot the carp with.

code/modules/holodeck/HolodeckObjects.dm

@@ -482,6 +482,19 @@
 	meat_type = null
 	light_range = 2
 	smart_melee = TRUE
+	blood_overlay_icon = null
+	blood_type = null
+
+/mob/living/simple_animal/hostile/carp/holodeck/Initialize()
+	. = ..()
+	atom_flags |= ATOM_FLAG_NO_BLOOD
+
+/mob/living/simple_animal/hostile/carp/holodeck/handle_bleeding_timer(var/damage_inflicted)
+	return
+/mob/living/simple_animal/hostile/carp/holodeck/handle_blood(var/force_reset = FALSE)
+	return
+/mob/living/simple_animal/hostile/carp/holodeck/bullet_impact_visuals(obj/projectile/impacting_projectile, def_zone, damage, blocked)
+	return
 
 /mob/living/simple_animal/hostile/carp/holodeck/proc/set_safety(var/safe)
 	if (safe)
@@ -587,3 +600,14 @@
 /mob/living/simple_animal/cat/kitten/holodeck/death()
 	..()
 	derez()
+
+//Holo xenofauna gun
+
+/obj/item/gun/energy/mousegun/xenofauna/holo
+	projectile_type = /obj/projectile/beam/mousegun/xenofauna_holo
+	name = "holo xenofauna gun"
+	desc = "The NT \"Arodentia\" Pesti-Shock is a highly sophisticated and probably safe beamgun designed for rapid pest-control. This one is holographic and harmless to actual lifeforms."
+	max_shots = 100
+	recharge_time = 1
+	self_recharge = TRUE
+	recharge_multiplier = 5