feat: Implement network battle and practice modes with question generation

- Added `questionGenerator.ts` for dynamic question generation based on difficulty levels.
- Created `NetworkBattle.vue` for real-time multiplayer gameplay using PeerJS.
- Developed `Practice.vue` for single-player practice sessions with score tracking and history.
- Updated `yarn.lock` to include new dependencies for PeerJS and message packing.
- Enhanced UI with responsive design and feedback animations for user interactions.

package.json

@@ -13,6 +13,7 @@
     "format": "prettier --write src/"
   },
   "dependencies": {
+    "peerjs": "^1.5.4",
     "pinia": "^3.0.1",
     "vue": "^3.5.13",
     "vue-router": "^4.5.0"