Add option to disable server auto-join feature #7942

Please confirm the following.

• I checked the existing issues for duplicate feature requests

What parts of Modrinth is your feature request related too?

Modrinth App

Is your suggested feature related to a problem? Please describe.

Server instances alter the "Play" button to automatically launch and join the target server when pressed. While one can choose from the added dropdown to launch the instance every time instead, this is irritating and likely would not be viable for large servers with high player counts.

Describe the solution you'd like

Project authors may choose to disable the automatic joining feature on a modrinth.com server listing.

Describe alternatives you've considered

No response

Additional context

No response