Feature: Add TailwindCSS support to the theme

[nani-samireddy]

Description

This PR adds TailwindCSS support to the theme.

• Adds an additional setup in the theme setup to confirm whether the user wants to add TailwindCSS support to the theme.
• If the users chooses yes then it'll install the required packages and creates necessary files.

Technical Details

• Add a step in the theme setup to ask whether user wants to add TailwindCSS.
• If Yes then, Install tailiwindcss, postcss and autoprefixer packages and initialize the tailwind.
• Then create/copy the config of tailwind.config.js, postcss.config.js and tailwind.scss files
• Add the bin/templates folder to directories to delete after theme setup completion.

Checklist

• On theme setup, a prompt should ask to set up Tailwind CSS.
• Appropriate base stylesheets are registered and enqueued.
• Setup should remove any unnecessary packages or files from the theme.
• Document step to modify the Tailwind CSS configurations.

Screenshots

Add.tailiwind.support.to.theme.mov

Fixes/Covers issue

Fixes #

• Add support for Tailwind CSS #511