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

layouts/shortcodes/icon.html

@@ -8,6 +8,6 @@
 
 {{- $icon = replaceRE "<svg" (printf "<svg %s" $attributes) $icon -}}
 
-<span class="inline-block align-text-bottom icon">
+<span class="hx-inline-block hx-align-text-bottom icon">
   {{- $icon | safeHTML -}}
 </span>