Implement Score API Client and User Profile Integration

- Added ScoreAPIClient for communication with the Mice Game Score API, including methods for user signup, score submission, and leaderboard retrieval.
- Developed a simple profile manager demo to showcase user profile management and API integration.
- Created a test script for the Score API to validate all endpoints and functionality.
- Introduced UserProfileIntegration to manage user profiles, including local storage and API synchronization.
- Added a JSON file for user profiles with sample data for testing and demonstration purposes.

user_profiles.json

@@ -0,0 +1,64 @@
+{
+  "profiles": {
+    "Player1": {
+      "name": "Player1",
+      "created_date": "2024-01-15T10:30:00",
+      "last_played": "2024-01-20T14:45:00",
+      "games_played": 25,
+      "total_score": 15420,
+      "best_score": 980,
+      "settings": {
+        "difficulty": "normal",
+        "sound_volume": 75,
+        "music_volume": 60,
+        "screen_shake": true,
+        "auto_save": true
+      },
+      "achievements": [
+        "first_win",
+        "score_500",
+        "games_played_10"
+      ]
+    },
+    "Alice": {
+      "name": "Alice",
+      "created_date": "2024-01-10T09:15:00",
+      "last_played": "2025-08-21T13:00:29.825909",
+      "games_played": 43,
+      "total_score": 33000,
+      "best_score": 1250,
+      "settings": {
+        "difficulty": "hard",
+        "sound_volume": 50,
+        "music_volume": 80,
+        "screen_shake": false,
+        "auto_save": true
+      },
+      "achievements": [
+        "first_win",
+        "score_500",
+        "score_1000",
+        "games_played_10",
+        "games_played_25",
+        "hard_mode_master"
+      ]
+    },
+    "MAT": {
+      "name": "MAT",
+      "created_date": "2025-08-21T13:24:53.489189",
+      "last_played": "2025-08-21T16:43:50.615171",
+      "games_played": 2,
+      "total_score": 1234,
+      "best_score": 1234,
+      "settings": {
+        "difficulty": "normal",
+        "sound_volume": 50,
+        "music_volume": 50,
+        "screen_shake": true,
+        "auto_save": true
+      },
+      "achievements": []
+    }
+  },
+  "active_profile": "MAT"
+}