[Feature] Action to move all windows of current app into (or out of) current column/stack

Is your feature request related to a problem? Please describe.

Sometimes I end up with a large number of windows of the same app -- namely the browser (1) and the text editor (2). I'd like a simple way to tidy up by bringing all windows of an app into a stack, without manipulating each window one at a time.

Describe the solution you'd like

I hit a keyboard shortcut, and all windows of the same app as the current window are moved into the current column, and (less important) this column is put in stack mode.

But if all windows of the current window's app were already in this column, the column is disassembled into one column for each window.

Alternately, those could be two separate shortcuts (gather/round-up, explode/disperse).

Describe alternatives you've considered

Focusing each window and moving it over into the column, one by one.

Start with the requested gather and explode behavior in the issue description; no files, tests, or entry points are named. Determine how the current window's application and column/stack are represented, then confirm the shortcut design and verify that both moving all matching windows and reversing the operation work as described.