Throw windows across monitors with Super+Shift+arrows

[anagrius]

What

Super+Shift+arrows still swaps with a neighbor on the current workspace. When there isn't one in that direction, it now moves the window onto the adjacent monitor instead of swapping with a window there (or doing nothing if that workspace is empty).

A throw also lands on the incoming edge of the destination. Dwindle's force_split = 2 would otherwise insert a rightward throw on the far side.

Why

Hyprland's directional swap looks across monitors. With one window per screen that exchanges them. With an empty target, nothing happens. Same-workspace swap is unchanged, which is what the manual demonstrates on a single display.

Test plan

• Two tiled windows on one workspace: Super+Shift+Left/Right still swaps them
• One window on the right monitor, empty left monitor: Super+Shift+Left moves it over
• One window on each monitor: Super+Shift+Left from the right monitor joins the left workspace; the left window stays
• Throw from left to right: incoming window is on the left of the right monitor