[HELP] Apply focus_follows_mouse only when switching display using the mouse

Hello.
I'm enjoying Yabai so far. It is possible to add `focus_follows_mouse autofocus` only when the user moves the mouse cursor in a different display, and `focus_follows_mouse off` the rest of the operations (focus different window in the same display, etc.).
Only triggers the `focus_follows_mouse autofocus` effect if the user drags the cursor into a different display. Once the user is in the new display, `focus_follows_mouse off` activates.

Does that make sense?

I'm not a fan of `focus_follows_mouse` all the time but could be useful if this applies only when I switch to a different display with my mouse.

Thanks!

The issue names no files, tests, or entry points. Start by locating the existing focus_follows_mouse handling and the code that detects mouse movement between displays; done means the requested behavior works for cross-display mouse movement without changing other focus operations.

Written by the indexing model from the issue text.