refactor: redesign map gen

src/samples/slay-the-spire-like/map/index.ts

@@ -1,4 +1,4 @@
-export { MapNodeType } from './types';
+export { MapNodeType, MapLayerType } from './types';
 export type { MapNode, MapLayer, PointCrawlMap } from './types';
 
 export { generatePointCrawlMap } from './generator';