fix: added css-loader

Author: frankpagan

package.json

@@ -43,6 +43,7 @@
   },
   "main": "./src/index.js",
   "devDependencies": {
+    "css-loader": "^5.1.3",
     "esbuild": "^0.25.2",
     "esbuild-loader": "^4.3.0",
     "html-webpack-plugin": "^5.3.1",