Can't query workspaces by active display

[brianwk]

Use case: I use Sketchybar to display the spaces with an icon and the hotkey number.

As far as I know, I can't practically get the active workspace by display using Rift. This causes my Sketchybar to have to update on both monitors, making the highlighted active space wrong on one display.

In Aerospace, they solve this with a simple argument, which I believe is something like --active? But in Rift maybe just add a new query that outputs all of the workspaces based on their state like "active"?

First of all, when I query anything, it only shows in the active context (i.e.: the active display / virtual space).
Second of all, I can't query what display is "active" from Rift.

Originally posted by @brianwk in #131

[brianwk]

Seems to work great, but I only just now got it setup with Sketchybar. I'm now able to setup Sketchybar exactly like it was setup with Aerospace, but with less scripting!