feat: implement Players component with data fetching and loading state; remove mock data and enhance error handling in database service

public/mock/orgs.json

@@ -1,14 +0,0 @@
-[
-  {
-    "id": 1,
-    "name": "Mock Organization",
-    "description": "This is a mock organization that appears when the backend is unavailable.",
-    "leader": "DrKButz",
-    "members": ["8984c0b5-d912-4462-b189-c864fba4a1af"],
-    "gallery": [],
-    "cityStats": {
-      "influence": 50,
-      "reputation": 75
-    }
-  }
-]

public/mock/players.json

@@ -1,37 +0,0 @@
-[
-  {
-    "uuid": "8984c0b5-d912-4462-b189-c864fba4a1af",
-    "name": "DrKButz",
-    "discordId": "mock_discord_id",
-    "storyMarkdown": "# Mock Player Story\n\nThis is a mock player story that appears when the backend is unavailable.",
-    "tags": ["admin", "developer"],
-    "stats": {
-      "health": 100,
-      "armor": 50,
-      "money": 10000
-    },
-    "inventory": [
-      {"id": "weapon_pistol", "name": "Pistol", "quantity": 1},
-      {"id": "item_medkit", "name": "Medkit", "quantity": 3}
-    ],
-    "isOnline": false,
-    "lastSeen": "2025-01-01T12:00:00Z"
-  },
-  {
-    "uuid": "123e4567-e89b-12d3-a456-426614174000",
-    "name": "TestPlayer",
-    "discordId": null,
-    "storyMarkdown": "# Test Player\n\nThis is a test player for mock data purposes.",
-    "tags": ["player"],
-    "stats": {
-      "health": 80,
-      "armor": 30,
-      "money": 5000
-    },
-    "inventory": [
-      {"id": "item_food", "name": "Food", "quantity": 5}
-    ],
-    "isOnline": true,
-    "lastSeen": "2025-01-01T10:00:00Z"
-  }
-]

public/mock/projects.json

@@ -1,13 +0,0 @@
-[
-  {
-    "id": 1,
-    "name": "Mock Project",
-    "description": "This is a mock project that appears when the backend is unavailable.",
-    "leader": "DrKButz",
-    "employees": ["8984c0b5-d912-4462-b189-c864fba4a1af"],
-    "shopCatalog": [],
-    "gallery": [],
-    "hiring": false,
-    "status": "active"
-  }
-]