survivors: adding items and item drops

adding rarities to items
adding drops to enemies

absurd-survivors/src/utils.ts

@@ -77,4 +77,8 @@ export function getCoordinatesSplit(amount: number) {
         points.push(new Vector(x, y))
     }
     return points;
+}
+
+export function randomItem(items: any[]) {
+    return items[Math.floor(Math.random() * items.length)]
 }