feat: add encounter map

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

@@ -0,0 +1,5 @@
+export { MapNodeType } from './types';
+export type { MapNode, MapLayer, PointCrawlMap } from './types';
+
+export { generatePointCrawlMap } from './generator';
+export { getNode, getChildren, getParents, hasPath, findAllPaths } from './generator';