feat: add hx- prefix to Hextra Tailwind CSS classes (#300)

* feat: add prefix to tailwind css classes

* fix: remove unnecessary prefixes

* fix: add missing prefix in other places

* chore: regenerate hugo_stats.json

* chore: run `npm run build:css`

* chore: add `hx-` prefix to _index.fa.md

* fix: lang switcher display issue

* fix: add `hx-` prefix to showcase/index.fa.md

* fix: lang switch param mistake

tailwind.config.js

@@ -11,6 +11,7 @@ const makePrimaryColor =
 
 /** @type {import('tailwindcss').Config} */
 module.exports = {
+  prefix: 'hx-',
   content: [
     './**/hugo_stats.json',
   ],