ui: init windows 98 theme

packages/ui-default/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.5.5",
+  "version": "4.5.6",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",
@@ -99,9 +99,11 @@
     "vinyl-buffer": "^1.0.1",
     "vj-simplemde": "0.0.8",
     "webpack": "^4.44.2",
-    "webpack-bundle-analyzer": "^4.4.0"
+    "webpack-bundle-analyzer": "^4.4.0",
+    "webpack-dev-server": "^3.11.2"
   },
   "dependencies": {
+    "98.css": "^0.1.16",
     "js-yaml": "^4.0.0",
     "katex": "^0.13.0",
     "lodash": "^4.17.21",
@@ -118,4 +120,4 @@
     "xss": "^1.0.8",
     "yargs": "^16.2.0"
   }
-}
+}