include shell script for better behaviour on multiple-workspace setups

For environments where there are different workspaces/groups/tabs, ideally an Equake frame open in a non-visible workspace should be moved to the current workspace rather than being (invisibly) minimised in its current workspace (which then requires two clicks of the calling keybinding to get it to appear on the current workspace).

For StumpWM, I came up with a complicated way of moving Equake from one group (~workspace) to another, but it's complicated and StumpWM specific.

A simple shell script in many cases could address this problem.

@jeffkowalski - do you think I could include some version of the shell script you posted at #23 (comment 971632336) ? This seems to work well to address this issue.