feat: add theme selector and persistence

- Add a theme selector switch that allows users to toggle between light and dark modes
- Persist the selected theme across page refreshes using localStorage
- Adjust card and page contrast for better visibility in both light and dark modes

package.json

@@ -15,11 +15,12 @@
   "dependencies": {
     "@apollo/client": "^3.8.7",
     "@auth0/auth0-react": "^2.2.4",
-    "@emotion/react": "^11.11.1",
+    "@emotion/react": "^11.11.3",
     "@emotion/styled": "^11.11.0",
     "@faker-js/faker": "^8.2.0",
     "@fontsource/roboto": "^5.0.8",
-    "@mui/material": "^5.14.13",
+    "@mui/icons-material": "^5.15.2",
+    "@mui/material": "^5.15.2",
     "graphql": "^16.8.1",
     "react": "^18.2.0",
     "react-dom": "^18.2.0"