feat(Spoolman): spool progress indicator

[pedrolamas]

Shows a circular progress indicator around the spool icon.

Screenshot (progress values are random for demo purposes)

[pedrolamas]

@matmen layout is never my thing, so if you have any thoughts on how better to show this, I'm all ears... 😁

[matmen]

I haven't had time to test this yet (though the code LGTM), but layout wise it looks fine to me :) At first I was unsure if the blue part was showing how much filament has already been used or how much is left on the spool, but I guess it makes sense for it to show how much is left

[moggieuk]

I'm not suggesting you change the base icon but users of the Happy Hare panel like the readability of a simple %. Could you layer a rectangle with % in contrasting color?

The use of progress meter is cute but doesn't immediately jump out at me with purpose. I do like having a simple indication of available filament though.
Caveat: I'm not a designer :-)

[pedrolamas]

@moggieuk I did notice that on Happy Hare and do like it!

I ran a couple of experiments on this layout and didn't reach something I actually liked, so for now I will merge this as-is and revisit at a later time for improvements!