Border gradient animation

[beckend]

In hyprland you can configure:

  animation = borderangle, 1, 15, linear, loop

Description from their README
borderangle - for animating the border's gradient angle - styles: once (default), loop

Basically it spins around and you can configure the speed.

[YaLTeR]

Note that animating the niri gradient angle (which is the same as CSS linear-gradient angle) does not produce a smooth rotating animation:

gradient-angle-not-smooth.mp4

[beckend]

Can we then get to decide the animation function so the speed is adjusted dynamically. Either way, looks fine/good.