Add quick server preview dialog for instant server data lookup

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Description

Currently, to query a server and view its data (such as MOTD, version, and player count), users must go through the full server addition process. This is inefficient, since it requires entering a server name, adding it to the list, waiting for it to refresh, viewing its data, and then deleting it afterward.

To simplify this workflow, a Quick Server Preview dialog should be added to the Multiplayer screen. This dialog would allow users to query a server's data without permanently adding it to the server list.

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Proposed Solution

Add a lightweight Quick Server Preview tool accessible from the Multiplayer screen.

Dialog behavior:

• Opens as a simple alert-style dialog.
• Requires only a server IP address to be entered.
• On confirm, immediately queries the server and displays all the data.
• Includes an optional query mode selector, affecting only that dialog instance.
  • The default query mode should be inherited from the current query mode used by the main server list.
• The dialog does not modify the existing server list.

Additional Enhancements (future versions):

• Implement server address history to allow quick re-querying of recently checked servers.
• Include an "Add to List" button that opens the standard Add Server dialog with the server address field pre-filled, allowing the user to complete the addition quickly.