fix: 🐛 inline Buffer and URL

Author: streamich

src/vendor/node/fs.ts

@@ -1,4 +1,8 @@
 // Inlined types from node:fs to avoid implicit dependencies
+
+import type { Buffer } from './buffer';
+import type { URL } from './url';
+
 export type PathLike = string | Buffer | URL;
 
 // tslint:disable-next-line:no-namespace