Allow localization of option page's name and title

[laundy]

First of all: Incredible work, I use the package a lot! 🤩

I've noticed that the option page is not localizable yet, so I've just added the necessary functionality. Also, I've included the $position in the options.stub and added a hint for developers to change the $position, otherwise only one (or none) will be displayed.

Please also test the code and I'd be happy if the change gets merged.

[Log1x]

Hey! Thanks for this. I'm glad you like ACF Composer.

Everything looks good, but would you mind dropping the// TODO: change to another value if you have multiple option pages. comment from the stubs? 👀 I'd be open to something in stub generation that auto-iterates that value in the future but otherwise just not huge on the inline comment.

[laundy]

Thanks for your feedback. Sure, the todo comments are removed.