fix(chrome-extension): add .js extension to ESM imports (#987)

When the package is built with "type": "module" in package.json, Node.js ESM
resolution requires explicit file extensions for relative imports. Without the
.js extension, imports fail with 'Cannot find module' error.

This change ensures proper module resolution in ESM environments.

Co-authored-by: sgyy <shangguan@topick.ai>

Author: sgyy

packages/chrome-extension/src/index.ts

@@ -9,10 +9,10 @@ import {
   generateState,
 } from '@logto/browser';
 
-import { ChromeExtensionStorage } from './storage';
+import { ChromeExtensionStorage } from './storage.js';
 
 export * from '@logto/browser';
-export { ChromeExtensionStorage } from './storage';
+export { ChromeExtensionStorage } from './storage.js';
 
 export default class LogtoClient extends BaseClient {
   /**