Install zustand for client state management

Replaces usage of useState

Author: mizlan

website/package-lock.json

@@ -13,7 +13,8 @@
     "react-router": "^7.5.1",
     "react-scripts": "^5.0.1",
     "react-scroll": "^1.8.1",
-    "recharts": "^2.0.8"
+    "recharts": "^2.0.8",
+    "zustand": "^5.0.4"
   },
   "scripts": {
     "start": "react-scripts start",