chore: use a list

Using an object with number keys is the same thing.

src/data/data-types.ts

@@ -21,9 +21,7 @@ type Lvl2 = 2;
 /**
  * Represent the stairs.
  */
-type StairList = Record<NumberIndex, Coords2D>;
-
-type NumberIndex = `${number}`;
+type StairList = Coords2D[];
 
 /**
  * Represent coordinates for stairs.
@@ -109,13 +107,4 @@ type GWing = "G";
  */
 type HWing = "H";
 
-export type {
-  Coords,
-  Coords2D,
-  Level,
-  Lvl,
-  NumberIndex,
-  Rooms,
-  StairList,
-  Wing,
-};
+export type { Coords, Coords2D, Level, Lvl, Rooms, StairList, Wing };

src/data/schemas.ts

@@ -1,5 +1,4 @@
 import { z } from "zod";
-import type { NumberIndex } from "./data-types.ts";
 import { rooms } from "./rooms.ts";
 
 type ProfilesList = z.infer<typeof profilesListSchema>;
@@ -86,15 +85,4 @@ const profilesListSchema = z.union([
   z.tuple([]),
 ]);
 
-const numberIndexSchema = z.custom<NumberIndex>((val) =>
-  z.string().regex(/^\d+$/).safeParse(val),
-);
-
-export {
-  isKey,
-  numberIndexSchema,
-  profilesListSchema,
-  roomSchema,
-  type ProfilesList,
-  type Room,
-};
+export { isKey, profilesListSchema, roomSchema, type ProfilesList, type Room };

src/data/stairs.ts

@@ -1,19 +1,19 @@
 import type { StairList } from "./data-types.ts";
 
-const stairs = {
-  "0": [23, 13],
-  "1": [63, 16],
-  "2": [103, 16],
-  "3": [65, 61],
-  "4": [96, 61],
-  "5": [129, 119],
-  "6": [68, 121],
-  "7": [92, 121],
-} as const satisfies StairList;
+const stairs = [
+  [23, 13],
+  [63, 16],
+  [103, 16],
+  [65, 61],
+  [96, 61],
+  [129, 119],
+  [68, 121],
+  [92, 121],
+] as const satisfies StairList;
 
-const btmStairs = {
-  "0": [90, 154],
-  "1": [71, 154],
-} as const satisfies StairList;
+const btmStairs = [
+  [90, 154],
+  [71, 154],
+] as const satisfies StairList;
 
 export { btmStairs, stairs };

src/script.ts

@@ -24,7 +24,6 @@ import { level0, level1, level2 } from "./data/levels.ts";
 import { rooms } from "./data/rooms.ts";
 import {
   isKey,
-  numberIndexSchema,
   profilesListSchema,
   roomSchema,
   type ProfilesList,
@@ -413,7 +412,7 @@ function pathCalculationInternals(
     }
   }
 
-  return stairs[numberIndexSchema.parse(minData.minIndex.toString())];
+  return stairs[minData.minIndex];
 }
 
 function stairPath(