revert: convert Tailwind config to TypeScript

This reverts commit 906b34d21c.

package.json

@@ -15,6 +15,7 @@
     "@astrojs/mdx": "^0.18.3",
     "@astrojs/rss": "^2.3.2",
     "@astrojs/sitemap": "^1.2.2",
+    "@astrojs/tailwind": "^3.1.1",
     "@tailwindcss/aspect-ratio": "^0.4.2",
     "@tailwindcss/forms": "^0.5.3",
     "@tailwindcss/nesting": "^0.0.0-insiders.565cd3e",
@@ -33,7 +34,6 @@
   },
   "devDependencies": {
     "@types/lodash": "^4.14.191",
-    "autoprefixer": "^10.4.14",
     "prettier": "^2.8.7",
     "prettier-plugin-astro": "^0.8.0",
     "rustywind": "^0.15.3"