chore(web): add radix UI dependencies for quiz components (SSC-8)

Install required Radix UI packages for quiz features:
- @radix-ui/react-slider: Slider component for settings
- @radix-ui/react-alert-dialog: Confirmation dialogs

Author: Sakeeb91

apps/web/package.json

@@ -11,6 +11,7 @@
   },
   "dependencies": {
     "@radix-ui/react-accordion": "^1.2.12",
+    "@radix-ui/react-alert-dialog": "^1.1.15",
     "@radix-ui/react-avatar": "^1.1.11",
     "@radix-ui/react-dialog": "^1.1.15",
     "@radix-ui/react-dropdown-menu": "^2.1.16",
@@ -19,6 +20,7 @@
     "@radix-ui/react-scroll-area": "^1.2.10",
     "@radix-ui/react-select": "^2.2.6",
     "@radix-ui/react-separator": "^1.1.8",
+    "@radix-ui/react-slider": "^1.3.6",
     "@radix-ui/react-slot": "^1.2.4",
     "@radix-ui/react-switch": "^1.2.6",
     "@radix-ui/react-tabs": "^1.1.13",