refactor: update piet, cairo, gtk based deps, switch to new glib::clone macro syntax

[flxzt]

This bumps glib, cairo, glib, .. gtk based dependencies to the latest version.

In order to do that, we have to patch piet with the unfortunately not yet merged pango-cairo branch.

After doing so, there were some minor adjustments to the code needed to compile and adapt to the new API. The most prominent change is that all uses of the glib::clone macro are ported to the new syntax which enables code formatting and integrates better with rust-analyzer (reference renaming, warnings when references are unused!)

[RayJW]

Although it might be worth opening a new issue or discussion for this, at what point might it be worth looking into slowly trying to branch into a vello (or similar for that matter) port? It looks like piet might not see a new (feature) release ever, so things like this might just become more tedious as time goes on.

[Doublonmousse]

@RayJW Not before we manage to make the gpu part work. For this to work we need to find a way to make wgpu work inside of a gtk window.

And for now this is not solved. There may be a way on 4.14 (and 4.16) using dma buf and the graphics offload but that's only supported on linux wayland (but maybe other in the future).

See gtk-rs/gtk4-rs#1278
Also https://github.com/Doublonmousse/wgpu-dma-buf (maybe it works, still some work to do, and on open gl es, not vulkan). In this case, any help is welcome !

[RayJW]

@RayJW Not before we manage to make the gpu part work. For this to work we need to find a way to make wgpu work inside of a gtk window.

And for now this is not solved. There may be a way on 4.14 (and 4.16) using dma buf and the graphics offload but that's only supported on linux wayland (but maybe other in the future).

See gtk-rs/gtk4-rs#1278 Also Doublonmousse/wgpu-dma-buf (maybe it works, still some work to do, and on open gl es, not vulkan). In this case, any help is welcome !

Thanks for the insight! That's why I asked, I just stumbled upon the same issues with piet, hence discovering its deprecation. But I see there is still some work left to get rid of piet. It might probably still be some time before requiring 4.16 is viable.

[flxzt]

I can't reasonably ask anyone to review all code changes in this PR, so I'll just be optimistic and merge