added more syntax highlighting

package.json

@@ -20,10 +20,14 @@
     "astro-min": "^1.1.0-dev.4",
     "npx": "^3.0.0",
     "rehype-autolink-headings": "^7.1.0",
+    "rehype-pretty-code": "^0.13.0",
     "rehype-slug": "^6.0.0",
     "remark-directive": "^3.0.0",
     "remark-external-links": "^9.0.1",
-    "sass": "^1.70.0"
+    "remark-toc": "^9.0.0",
+    "sass": "^1.70.0",
+    "shiki": "^1.0.0",
+    "unist-util-visit": "^5.0.0"
   },
   "devDependencies": {
     "@iconify-json/mdi": "^1.1.64"