masonry: make util pub to allow customizing buttons in an app

[eugenesvk]

Similar to #861 this would help creating custom elements while relying on the already used/tested library utilities

[DJMcNab]

What is the specific functionality you need access to from this module? I don't think that this module is designed to be public.

[eugenesvk]

I need the functions used in the Button Masonry widget (since I'm using that as a base) that are used in painting the button, specifically
use masonry::util::{fill_lin_gradient, stroke, UnitPoint};

[DJMcNab]

I'll defer this to @PoignardAzur. To unblock you, I'd suggest just copying these items into your own crate, or even just hardcoding the gradient parameters.

I'd be interested in hearing your report on how implementing your own button type goes. My current expectation is that the way we support styling (in the sense of implementing design systems) would be to use custom implementations of widgets, so I'm hoping that goes well for you.

Could you either create a thread on Zulip when you have something to share?

[PoignardAzur]

I think this is fine for now, though we'll probably remove that module eventually.