Is your feature request related to a problem? Please describe.
Controlify has a default-enabled option for smoother analog movement. This can trigger anticheats in servers.

Describe the solution you'd like
A default-enabled option to use a whitelist for multiplayer servers. On every new server, the user should get a toast like this:

You're using a controller on a new server. If the server rules allow, press X to enable smooth movement, otherwise we'll use keyboard-compatible movement.

If the user missed the toast, they can use mod options to add it manually. Not needed for singleplayer, LAN, Realms.
The user should also be able to turn the whitelist off to use smooth movement on all servers.

Describe alternatives you've considered
A global toggle for multiplayer servers that is separate from SP/LAN/Realms.

Additional context
As discussed