Type export change after 2.x.x update causes different import behavior

Hi!
First of all, thank you for your work on such an amazing plugin.

After updating the package from **1.14.0** to a **2.x.x** version, I noticed that the type definitions in the library have changed slightly, which now requires importing the package differently.

This happens because the current `export default` is just `ESLint.Plugin`, where configs is simply an indexed record. This differs from how other ESLint plugins usually handle their exports.

What do you think – would it be possible to restore the previous behavior?

P.S. The same issue occurs with `eslint-plugin-wc`, since (as far as I know) you’re the author of both 🙂

查看插件源代码中的 TypeScript 类型定义，可能位于 index.d.ts 或 main .ts 文件中。比较 1.x 和 2.x 之间的导出结构。理解 ESLint.Plugin 目前如何导出，以及与预期 configs record 的区别。检查 eslint-plugin-wc 是否具有相同的代码模式。修复涉及将导出调整为符合预期形状，然后在测试项目中验证 import 是否可用。

由索引模型根据 Issue 内容生成。