Support for `Webpack`

[haejunejung]

It provides supprt for Webpack.

webpack is a widely-used tool, especially when working with React or other JavaScript libraries and frameworks, for bundling code. However, one common issue developers face is the lack of TypeScript type definitions for the webpack.config.js, which makes configuration prone to errors or hard to manage.

With this support, the problem is addressed! It introduces type definitions that can be used when writing or maintaing your webpack configuration.