macOS Details (menu bar + docks)

[ademar111190]

I'm studying Rust and GTK and I couldn't find how to customize the following 3 details on macOS:

App menu, I would like to have something like "Hello World" instead of "hello-world":

App name and Icon on Dock, again "Hello World" instead of "hello-world" and any icon.

App name and Icon on command+tab Dock, again "Hello World" instead of "hello-world" and again any icon.

Thank you very much for the nice project, and hopefully for the examples! :)