Easier way to manager clients all on one page

### Issue Details

I’d like to request a feature that makes it easier to manage multiple clients within AdGuard DNS. Currently, the process of editing various client data is a bit cumbersome, as it requires navigating back and forth between pages to update multiple clients.

AdGuard DNS is currently more focused on server management, and while it does allow for client management, the process isn't as streamlined as it could be. For instance, when managing a large number of clients, it becomes tedious to make changes, as each client needs to be edited individually, requiring multiple clicks and navigation between different pages.

### Proposed solution

I suggest implementing a client management interface similar to what Control D offers. Control D has a dedicated section that allows for easier management of both servers and clients, which simplifies the process of making bulk edits to client data. A similar feature in AdGuard DNS would significantly enhance user experience, particularly for those managing multiple clients.

### Alternative solution

_No response_