Recommend npm or yarn installation commands for packages

[JoshuaKGoldberg]

When an ESLint configuration file is generated, at least the following packages will likely need to be available to use it:

• eslint itself
• @typescript-eslint/* plugins
• Any other plugins extended from by the package, such as eslint-plugin-prettier

When this package is run successfully, there should be a (bright cyan?) recommendation for a shell command to install the requisite packages. It should use npm by default, or yarn if there is a yarn.lock.

[KingDarBoja]

Is possible to provide the user prompt to pick up an option to install all suggested packages based on npm | yarn | no options?

[JoshuaKGoldberg]

@KingDarBoja yup, that sounds great!

[beenotung]

It would be nice to add an option for pnpm beside npm and yarn :)