feat: hide join/quit message for vanished players

[NgLoader]

Make it possible to disable the join/quit messages for vanished players.
It’s currently possible to suppress the join and quit message when toggling vanish, but not the actual join/quit messages.

[DrexHD]

What would be the use case for this? These messages are only sent to players that can see the other vanished players anyways!

[NgLoader]

Yea, but what if you use the Vanish mod just as an api?

The hidden join/quit message is a nice feature but not everyone needs this.

Even that the default join and leave message can be toggle but not for vanished players.

[DrexHD]

What is your API usecase? At the moment there isn't much API to use vanish, but more-so to add compat with vanish!

[NgLoader]

We're currently using the vanish mod api for our own system, which handle players, spectator and vanished players.

With the current implementation everything works fine but it always prints a join message, even when there isn't one.

If this is not the goal of the project I can compile a custom version for my server.
I just wanna add some more custimization for API only usage.

What do you thing of a boolen like "api-only: true" to toggle something like that?