deskflick 0.9.0 — diagonal desktop switching

Diagonal flicks now move you diagonally across the desktop grid: up-right goes one desktop up and one right. KWin has no such shortcut, so actions gained chaining — "A | B" or a TOML array — and the new "combine" keyword expands a diagonal into its two component directions, keeping it consistent with your straight flicks and inversion settings.