fix: added css-loader

Author: frankpagan

package.json

@@ -50,6 +50,7 @@
   },
   "main": "./src/index.js",
   "devDependencies": {
+    "css-loader": "^5.1.3",
     "esbuild": "^0.25.2",
     "esbuild-loader": "^4.3.0",
     "mini-css-extract-plugin": "^1.5.0",