Pass parameters to swww and/or allow the use of a wrapper script

[variasdesign]

Is your feature request related to a problem? Please describe.
I use swww with the --filter Nearest option, so all my pixel art scales nicely to the monitor size. Since using HyprPanel, it passes a series of hardcode parameters that doesn't include the one I used before.

Describe the solution you'd like
I would be nice to be able to pass parameters to swww (perhaps with a text field on the Theming > General section).

Describe alternatives you've considered
Maybe it would be easier to have a text field with the path to a wrapper script that executes with each wallpaper call. Then, we could pass our own parameters or develop a more rich wallpaper-setting logic (e.g. random wallpapers from a directory).

Thanks for your work 👍