feat(design): complete redesign of website

Redesign the website with a more modern look.

package.json

@@ -6,18 +6,21 @@
     "dev": "astro dev",
     "build": "astro build",
     "preview": "astro preview",
-    "update": "tsx scripts/update-specs.ts",
+    "update": "bun scripts/update-specs.ts",
     "astro": "astro"
   },
   "dependencies": {
-    "@astrojs/sitemap": "^3.2.1",
-    "astro": "^5.1.1"
+    "@astrojs/sitemap": "^3.6.1",
+    "astro": "^5.16.8",
+    "rehype-stringify": "^10.0.1",
+    "remark-parse": "^11.0.0",
+    "remark-rehype": "^11.1.2",
+    "unified": "^11.0.5"
   },
   "devDependencies": {
-    "@tailwindcss/typography": "^0.5.16",
-    "@tailwindcss/vite": "^4.0.0",
-    "tailwindcss": "^4.0.0",
-    "tsx": "^4.19.2",
-    "typescript": "^5.7.2"
+    "@tailwindcss/typography": "^0.5.19",
+    "@tailwindcss/vite": "^4.1.18",
+    "tailwindcss": "^4.1.18",
+    "typescript": "^5.9.3"
   }
 }