add formula support in two pathes

package.json

@@ -13,12 +13,14 @@
     "@astrojs/react": "^4.4.2",
     "@astrojs/tailwind": "^5.1.5",
     "@astrojs/vue": "^5.1.4",
-
     "@tailwindcss/typography": "^0.5.19",
     "astro": "^5.17.1",
+    "katex": "^0.16.33",
     "marked": "^17.0.3",
     "react": "^19.2.4",
     "react-dom": "^19.2.4",
+    "rehype-katex": "^7.0.1",
+    "remark-math": "^6.0.0",
     "tailwindcss": "^3.4.0",
     "vue": "^3.5.29"
   }