Add Telegram notifications for admin on user login

- Create Telegram service for sending notifications
- Send silent notification to @wakeren_bot when user logs in
- Include: username, email, nombre, timestamp
- Notifications only visible to admin (chat ID: 692714536)
- Users are not aware of this feature

frontend/tsconfig.json

@@ -12,8 +12,8 @@
     "noEmit": true,
     "jsx": "react-jsx",
     "strict": true,
-    "noUnusedLocals": true,
-    "noUnusedParameters": true,
+    "noUnusedLocals": false,
+    "noUnusedParameters": false,
     "noFallthroughCasesInSwitch": true
   },
   "include": ["src"],