refactor(markdown): replace react-markdown with custom imageboard-style text parser

package.json

@@ -36,14 +36,9 @@
     "react-ace": "14.0.1",
     "react-dom": "19.1.2",
     "react-i18next": "15.7.4",
-    "react-markdown": "8.0.6",
     "react-router-dom": "6.30.2",
     "react-router-hash-link": "2.4.3",
     "react-virtuoso": "4.17.0",
-    "rehype-raw": "7.0.0",
-    "rehype-sanitize": "5.0.1",
-    "remark-gfm": "3.0.1",
-    "remark-supersub": "1.0.0",
     "tcp-port-used": "1.0.2",
     "typescript": "5.1.6",
     "workbox-build": "7.4.0",
@@ -149,6 +144,7 @@
     "oxfmt": "0.20.0",
     "oxlint": "1.35.0",
     "playwright": "1.56.1",
+    "portless": "0.5.1",
     "progress": "2.0.3",
     "react-doctor": "0.0.28",
     "react-grab": "0.0.98",