Move your tailwind's postcss.config.js to package.json to reduce config files

When using only TailwindCSS with postcss in your app, you will see something like this in your postcss.config.js file:

module.exports = {
  plugins: {
    tailwindcss: {},
    autoprefixer: {},
  }
}

If there is no other plugins needed, you can move this config to your package.json file like this:

{
  "name": "test",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "build": "next build",
    "dev": "next dev",
    "lint": "next lint",
    "start": "next start"
  },
  "dependencies": {
    "autoprefixer": "10.4.15",
    "next": "13.4.19",
    "postcss": "8.4.29",
    "react": "18.2.0",
    "react-dom": "18.2.0",
    "tailwindcss": "3.3.3"
  },
  "postcss": {
    "plugins": {
      "tailwindcss": {},
      "autoprefixer": {}
    }
  }
}

This is mainly aimed to make the root folder of your project cleaner with less unneeded config files.