Toggle Window

For security reasons, since Gnome 41, cann't invoke 'org.gnome.Shell.Eval' to control the behavior of window by some gjs source code directly anymore.
So we have to move the actions into a gnome extension known as an "agent"(or something else), and expose a D-Bus interface to activate/minimized a window by its WM_CLASS for user.

• Get WMClass name of window

  We can use 'xprop WM_CLASS' command to get the WMClass name.
  For example:

        $xprop WM_CLASS
        WM_CLASS(STRING) = "gnome-terminal-server", "Gnome-terminal"

• Call method through DBus to control the window

  Then we can invokes the "cn.extensions.toggleWindow.ToggleWindowByWMClassName" method through dbus to toggle the window.
  If the window is activated(on the front), it will be minimized, or the window will be activated. So you can map a lot of keyboard shortcuts to navigate between your favorite X-programs without using mouse.
  For example:

        $gdbus call --session \
                --dest org.gnome.Shell \
                --object-path /cn/extensions/toggleWindow \
                --method cn.extensions.toggleWindow.ToggleWindowByWMClassName 'Gnome-terminal'