feat: add user preferences for online status and read receipts with real-time updates

- Introduced `showOnlineStatus` and `showReadReceipts` fields in the user schema and API.
- Integrated real-time status broadcasting in `UsersService` via `EventsGateway`.
- Updated repository and frontend user types to align with new fields.
- Enhanced user update handling to support dynamic preference changes for online status.

frontend/src/types/user.ts

@@ -9,6 +9,8 @@ export interface User {
 	role?: "user" | "admin" | "moderator";
 	status?: "active" | "verification" | "suspended" | "pending" | "deleted";
 	twoFactorEnabled?: boolean;
+	showOnlineStatus?: boolean;
+	showReadReceipts?: boolean;
 	createdAt: string;
 }