[fix-vendored-twsearch.ts] Skip directory nodes when copying/fixing files.

We need to exclude these due to a `bun` change that brought it in line with `node`, which is due to an unrelated issue I filed: oven-sh/bun#20507

Author: lgarron

script/fix-vendored-twsearch.ts

@@ -6,7 +6,11 @@ const DIR = fileURLToPath(
   new URL("../src/cubing/vendor/mpl/twsearch", import.meta.url),
 );
 
-for (const fileName of await readdir(DIR)) {
+for (const dirEnt of await readdir(DIR, { withFileTypes: true })) {
+  const { name: fileName, isDirectory } = dirEnt;
+  if (isDirectory()) {
+    continue;
+  }
   const filePath = join(DIR, fileName);
   console.log("Fixing:", filePath);
   let contents = await readFile(filePath, "utf-8");