I'd love a quicker way to convert images to the supported palette. Ideally also in a way that eliminates as many possible mistakes as possible.

I've used inky-palette.gpl but didn't get it to work. I had to edit and export the existing backdrop.png. I also want to convert a lot of weather icon images.

Is there any way to execute this conversion through gimp through the command line? (I'm on Linux so any bash, zsh compatible command would work)
If this is possible it becomes very easy to convert multiple files.

(I'm going to start looking into this myself, but any tips, experiments are welcome)