PostCSS custom config file or TS support

[mhkarimi1383]

Goals

1. being able to use PostCSS just like the standard PostCSS
2. Supporting TS for everything :)

Non-Goals

Background

I was setting up my project with tailwindcss but I was having issues after renaming postcss.config.js to postcss.config.ts and I was not able to use tailwind styles correctly

After reading documents about PostCSS in Next.JS https://nextjs.org/docs/pages/building-your-application/configuring/post-css I found that I have limited support for file name/type for PostCSS in Next.JS

Proposal

Adding support for TS and other config files that PostCSS supports

.postcssrc.js
.postcssrc.mjs
.postcssrc.cjs
.postcssrc.ts
.postcssrc.mts
.postcssrc.cts
postcss.config.js
postcss.config.mjs
postcss.config.cjs
postcss.config.ts
postcss.config.mts
postcss.config.cts

Also I have tried installing ts-node, (Same issue vitejs/vite#5316 And PR vitejs/vite#7935 on Vite)