[Fuck Shotties] Old Yellers Old Yeller (Improvised Shell Nerf) (#78235)

## About The Pull Request

Reworks improv shells to not be equal or even superior to buckshot, by
cutting their damage in half and reducing the wound bonuses. In return
they have a demolition_mod of 3, so do more damage overall to the
environment, a true vandal's paradise.

Added a glass shard to the recipe as an actual projectile instead of
just sheets of metal.

## Why It's Good For The Game

When buckshot was originally removed from the station (#55663) the
intended purpose was, as requested by oranges, to make shotguns a
specialist weapon instead of general purpose lethals.

It has come to my attention that improvised shells (which were initially
intended to be a weaker alternative made form commonly available
materials) are in fact better buckshot, and had no right to survive the
original nerf. I am now fixing that oversight by turning improvised
shells into a more specialised vandalism tool.

## Changelog
🆑
balance: Improvised shotgun shells now deal half as much damage to
humans and cause less wounds, but do 50% more damage to structures and
machines. They also require a glass shard for crafting.
/🆑

code/datums/components/crafting/weapon_ammo.dm

@@ -65,6 +65,7 @@
 	reqs = list(
 		/obj/item/stack/sheet/iron = 2,
 		/obj/item/stack/cable_coil = 1,
+		/obj/item/shard = 1,
 		/datum/reagent/fuel = 10,
 	)
 	tool_behaviors = list(TOOL_SCREWDRIVER)

code/modules/projectiles/ammunition/ballistic/shotgun.dm

@@ -105,12 +105,12 @@
 
 /obj/item/ammo_casing/shotgun/improvised
 	name = "improvised shell"
-	desc = "An extremely weak shotgun shell with multiple small pellets made out of metal shards."
+	desc = "A homemade shotgun casing filled with crushed glass, used to commmit vandalism and property damage."
 	icon_state = "improvshell"
 	projectile_type = /obj/projectile/bullet/pellet/shotgun_improvised
-	custom_materials = list(/datum/material/iron=SMALL_MATERIAL_AMOUNT*2.5)
-	pellets = 10
-	variance = 25
+	custom_materials = list(/datum/material/iron=SMALL_MATERIAL_AMOUNT*2, /datum/material/glass=SMALL_MATERIAL_AMOUNT*1)
+	pellets = 6
+	variance = 30
 
 /obj/item/ammo_casing/shotgun/ion
 	name = "ion shell"

code/modules/projectiles/projectile/bullets/shotgun.dm

@@ -118,14 +118,13 @@
 	embedding = null
 
 /obj/projectile/bullet/pellet/shotgun_improvised
-	tile_dropoff = 0.35 //Come on it does 6 damage don't be like that.
-	damage = 6
-	wound_bonus = 0
-	bare_wound_bonus = 7.5
+	damage = 5
+	wound_bonus = -5
+	demolition_mod = 3 //Very good at acts of vandalism
 
 /obj/projectile/bullet/pellet/shotgun_improvised/Initialize(mapload)
 	. = ..()
-	range = rand(1, 8)
+	range = rand(3, 8)
 
 /obj/projectile/bullet/pellet/shotgun_improvised/on_range()
 	do_sparks(1, TRUE, src)