chore: enable biome for markdown and update vscode settings

Author: miccy

biome.json

@@ -7,7 +7,7 @@
   },
   "files": {
     "ignoreUnknown": true,
-    "includes": ["**/*.ts", "**/*.tsx", "**/*.js", "**/*.mjs", "**/*.json"]
+    "includes": ["**/*.ts", "**/*.tsx", "**/*.js", "**/*.mjs", "**/*.json", "**/*.md"]
   },
   "formatter": {
     "enabled": true,