Feature to document

In the Typescript guide https://webpack.js.org/guides/typescript/, there's no mention of how to use webpack.config.ts instead of webpack.config.js. Some devs love to always use TS files as much as possible.

Additional information

Below are some references that provide a clue on how to set up webpack.config.ts

• https://learntypescript.dev/12/l4-webpack#adding-webpack-to-the-project
• Error: Unable to use specified module loaders for ".ts". webpack-cli#1993

[x] I am willing to work on this issue and submit a pull request.