[Feature] Mark an actress or studio as curated

[miltuss]

Hello, it is currently possible to mark scenes or images as organized, but it is not possible to mark performers or studios as organized. It would be interesting to do this to know if all the scenes from a studio or a performer have been downloaded for example.

[feederbox826]

A simple workaround could just be to add a Curated Tag to the performer and studio, and you can add your markers/ indicators off of that

[randemgame]

see #4970