feat(posts): add programming-challenges

package.json

@@ -40,6 +40,7 @@
     "date-and-time": "3.0.0",
     "gray-matter": "4.0.3",
     "html-react-parser": "3.0.16",
+    "katex": "0.16.7",
     "next": "13.4.3",
     "next-mdx-remote": "4.4.1",
     "next-pwa": "5.6.0",
@@ -48,9 +49,11 @@
     "react": "18.2.0",
     "react-dom": "18.2.0",
     "read-pkg": "8.0.0",
+    "rehype-katex": "6.0.3",
     "rehype-raw": "6.1.1",
     "rehype-slug": "5.1.0",
     "remark-gfm": "3.0.1",
+    "remark-math": "5.1.1",
     "sharp": "0.32.1",
     "shiki": "0.14.2",
     "unified": "10.1.2",