feat: [compositor, misc] ability to select previous workspace per monitor

[Truenya]

Describe your PR, what does it fix/add?

added previous_per_monitor parameter that selects the previously focused workspace on the currently focused monitor
#6545

Is there anything you want to mention? (unchecked code, possible bugs, found problems, breaking compatibility, etc.)

no

Is it ready for merging, or does it need work?

ready

[vaxerski]

cool, needs a wiki mr

[vaxerski]

and a clang-format

[Truenya]

about clang format, I'm using version 18.1.6
used such script for formatting

#!/bin/bash
for file in $(git diff --name-only); do
	echo "$file formatted"
	clang-format --style=file -i $file
done

[vaxerski]

clang-format -i src/**/*{cpp,hpp} works for me.

Just remove those changes

[vaxerski]

lgtm, thanks!