feat: add initial Socket.IO queue server implementation

- Created a basic Socket.IO server that manages user connections and queues for events.
- Implemented queue logic to handle concurrent user limits and JWT token issuance.
- Added MySQL configuration for potential persistence of queue positions.
- Introduced environment variables for configuration through a .env.example file.

package.json

@@ -9,19 +9,24 @@
     "lint": "eslint"
   },
   "dependencies": {
+    "dotenv": "^17.2.2",
+    "jsonwebtoken": "^9.0.2",
+    "mysql2": "^3.15.0",
+    "next": "15.5.3",
     "react": "19.1.0",
     "react-dom": "19.1.0",
-    "next": "15.5.3"
+    "socket.io": "^4.8.1",
+    "socket.io-client": "^4.8.1"
   },
   "devDependencies": {
-    "typescript": "^5",
+    "@eslint/eslintrc": "^3",
+    "@tailwindcss/postcss": "^4",
     "@types/node": "^20",
     "@types/react": "^19",
     "@types/react-dom": "^19",
-    "@tailwindcss/postcss": "^4",
-    "tailwindcss": "^4",
     "eslint": "^9",
     "eslint-config-next": "15.5.3",
-    "@eslint/eslintrc": "^3"
+    "tailwindcss": "^4",
+    "typescript": "^5"
   }
 }