[FEATURE] Show/hide certain moons to/from certain player actors

[PlasticMohawk]

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

As a worldbuilder implementing Cosmic Horror themes, for example, I may want to have a special moon which only certain characters I designate can see.

Describe the solution you'd like

I would like to have a toggle per moon which allows me to show or hide that moon from Simple Calendar, so a certain player can or cannot see it.

Describe alternatives you've considered I'm not really sure how to handle this using the given tools and environment.

Additional context Add any other context or screenshots about the feature request here.