**feat(storage): add script to reproduce FileSystemStorage initialization error**

- Created `reproduce_error.js` script to help debug FileSystemStorage initialization issues in Node.js environments.
  - Demonstrates error reproduction using `forceFileSystemStorage` option.
  - Captures and logs detailed error messages for better debugging.

**Purpose**: Simplify the process of reproducing and diagnosing FileSystemStorage-related issues by providing a standalone script.

reproduce_error.js

@@ -0,0 +1,27 @@
+#!/usr/bin/env node
+
+/**
+ * Script to reproduce the FileSystemStorage initialization error
+ */
+
+import { createStorage } from './dist/unified.js'
+
+async function reproduceError() {
+  console.log('Attempting to reproduce FileSystemStorage error...')
+  
+  try {
+    // This should trigger the same error as in the test
+    const storage = await createStorage({ forceFileSystemStorage: true })
+    console.log('Storage created successfully:', storage.constructor.name)
+    
+    // This should fail with the fs/path modules error
+    await storage.init()
+    console.log('Storage initialized successfully')
+    
+  } catch (error) {
+    console.error('Error reproduced:', error.message)
+    console.error('Full error:', error)
+  }
+}
+
+reproduceError()