improve markdown rendering (#213)

* feat: add support for GFM and highlight in markdown rendering

* feat: enhance markdown rendering by splitting YAML frontmatter and body

* feat: improve markdown styling for light and dark themes

* feat: enhance frontmatter parsing and display in SkillDetail component

apps/web-app/package.json

@@ -26,6 +26,8 @@
     "react-router-dom": "^7.13.0",
     "react-virtuoso": "^4.18.3",
     "rehype-highlight": "^7.0.2",
+    "rehype-raw": "^7.0.0",
+    "remark-gfm": "^4.0.1",
     "tailwind-merge": "^3.5.0"
   },
   "devDependencies": {