feat: add upgrade scrolls

src/engine/world/generator.ts

@@ -6,7 +6,8 @@ import {
   createConsumable, 
   createMeleeWeapon, 
   createRangedWeapon, 
-  createArmour 
+  createArmour,
+  createUpgradeScroll
 } from "../../core/config/Items";
 import { seededRandom } from "../../core/math";
 import * as ROT from "rot-js";
@@ -62,7 +63,8 @@ export function generateWorld(floor: number, runState: RunState): { world: World
           createMeleeWeapon("iron_sword", "sharp"),  // Sharp sword variant
           createConsumable("throwing_dagger", 3),
           createRangedWeapon("pistol"),
-          createArmour("leather_armor", "heavy")  // Heavy armour variant
+          createArmour("leather_armor", "heavy"),  // Heavy armour variant
+          createUpgradeScroll(2) // 2 Upgrade scrolls
         ] : [])
       ] 
     },