chore: migrate to spa

scripts/fs.ts

@@ -0,0 +1,25 @@
+import { stat } from 'node:fs/promises'
+
+export async function exists(path: string) {
+  try {
+    await stat(path)
+    return true
+  }
+  catch (error) {
+    if (isENOENTError(error))
+      return false
+
+    throw error
+  }
+}
+
+export function isENOENTError(error: unknown): boolean {
+  if (!(error instanceof Error))
+    return false
+  if (!('code' in error))
+    return false
+  if (error.code !== 'ENOENT')
+    return false
+
+  return true
+}