Docs: Add instructions for TypeScript

### Description

I am reading the [Express application generator](https://expressjs.com/en/starter/generator.html) page in the documentation and see that there is no mention of TypeScript at all. There is lack of official documentation on how to use Express with TypeScript.

### Expectations

A possible solution is to reference the https://github.com/seanpmaxwell/express-generator-typescript community project.