feat: tup-700 add CSS as sideEffects

"To prevent the CSS files from being accidentally removed by the consumer's tree-shaking efforts…"
—https://dev.to/receter/how-to-create-a-react-component-library-using-vites-library-mode-4lma#side-effects

package.json

@@ -89,5 +89,8 @@
   "peerDependencies": {
     "react": "18.2.0",
     "react-dom": "18.2.0"
-  }
+  },
+  "sideEffects": [
+    "libs/core-componets/**/*.css"
+  ]
 }