ui: use vditor as default markdown editor

packages/ui-default/package.json

@@ -34,7 +34,6 @@
     "chalk": "^4.1.0",
     "classnames": "^2.3.1",
     "clipboard": "^2.0.8",
-    "codemirror": "^5.59.4",
     "copy-webpack-plugin": "^6.1.1",
     "css-loader": "^4.2.2",
     "diff-dom": "^4.2.2",
@@ -95,8 +94,8 @@
     "timeago-react": "^3.0.2",
     "timeago.js": "^4.0.2",
     "uuid": "^8.3.2",
+    "vditor": "^3.8.4",
     "vinyl-buffer": "^1.0.1",
-    "vj-simplemde": "0.0.8",
     "wastyle": "^0.0.5",
     "webpack": "^4.44.2",
     "webpack-bundle-analyzer": "^4.4.0",