refactor: rename formatter utilities

internal/node-utils/src/formatter.ts

@@ -0,0 +1,13 @@
+import fs from 'node:fs/promises';
+
+import { execa } from 'execa';
+
+async function formatFile(filepath: string) {
+  await execa('oxfmt', [filepath], {
+    stdio: 'inherit',
+  });
+
+  return await fs.readFile(filepath, 'utf8');
+}
+
+export { formatFile };