[feat] macOS - Add a way to access Dock api

[BillGoldenWater]

Describe the problem

For show progress bars on dock icon.
For add item to right click menu for shortcut.
For listen "activate" event, for reopen window when all windows are closed.
etc.

Describe the solution you'd like

some pseudocode

progress bar:

app.get_dock().unwrap().update_progress_bar(show: bool, percent: f32)

adding items:

app.get_dock().unwrap().setMenu(menu: Menu)
// like tauri::Menu

listen "activate" event:

app..get_dock().unwrap().addEventHandler(id: &str, |app_handle, event| match event {
  DockEvent::Activate {window_all_closed: bool} => {
    if (!window_all_closed) {
      show_main_window()
    }
  }

  _ => {}
})

app..get_dock().unwrap().removeEventHandler(id: &str)

Alternatives considered

No response

Additional context

No response

[FabianLars]

A little bit of context, i asked for this issue because i didn't find an existing issue for the dock menu.
On that note, #3084 is the tracking issue for the events and #4208 for the progress bar.

[amrbashir]

duplicate of #2358

[FabianLars]

Ah i thought that one is only about showing/hiding the icon and stuff, and not for the custom menu, my bad then.