Added more markdown syntax, and added portals.

Frontend/package.json

@@ -17,7 +17,9 @@
     "@codemirror/lang-html": "^6.4.9",
     "@codemirror/lang-json": "^6.0.1",
     "markdown-it": "^14.1.0",
-    "markdown-it-task-lists": "^2.1.1"
+    "markdown-it-task-lists": "^2.1.1",
+    "markdown-it-mark": "^4.0.0",
+    "markdown-it-footnote": "^4.0.0"
   },
   "devDependencies": {
     "@vitejs/plugin-react": "^4.3.1",