feat: implement blog template

package.json

@@ -14,11 +14,15 @@
   },
   "dependencies": {
     "@astrojs/cloudflare": "^12.6.5",
+    "@astrojs/mdx": "^4.3.4",
     "@tailwindcss/vite": "^4.1.11",
     "astro": "^5.12.8",
     "astro-icon": "^1.1.5",
+    "katex": "^0.16.22",
     "lucide-astro": "^0.536.0",
     "lucide-react": "^0.536.0",
+    "rehype-katex": "^7.0.1",
+    "remark-math": "^6.0.0",
     "serve": "^14.2.4",
     "tailwindcss": "^4.1.11"
   }