Allow width to be set per box in boxplot

[EdsterG]

Description

Allows width to be set per box. Not sure if this is a bug fix or new feature, classified it as a bug fix since colors can be set per box.

This also fixes boxplot when range is zero. Before this PR nothing would get plotted (because the color vector was empty), after this PR the plot works correctly with zero range.

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist

• Added an entry in CHANGELOG.md (for new features and breaking changes)
• Added or changed relevant sections in the documentation
• Added unit tests for new algorithms, conversion methods, etc.
• Added reference image tests for new plotting functions, recipes, visual options, etc.

[EdsterG]

This PR is good to go on my end. Would like to add a test but it overlaps with #4433. How would you like to coordinate it @ffreyer? Can ether wait for #4433 to get merged, OR if this PR is merged before, #4433 can easily be updated to test width, e.g. WGLMakie.boxplot(fig[1, 1], categories, values, width = categories ./ 3).

[ffreyer]

I'll try to get my test related prs merged in the next couple days. If you want you can copy the test from #4433 and add a modified version here, but I think it's easy enough to modify and recognize errors that I can do it later myself.

[EdsterG]

Why do the tests fail on scatter? I thought that was fixed and RNG stabilized?

[ffreyer]

The PlotUtils fix changed the RNG to StableRNG so the test was expected to fail. I uploaded a new refimg for #4464 now so new test rus should pass.

[EdsterG]

Nice, thanks for fixing these test issues and for adding all of the new tests.

[EdsterG]

@ffreyer I've updated the ref image tests to include variable width per category, just needs an update to the ref images. If I understood correctly, only maintainers can update the ref images?

[ffreyer]

Thanks for updating. I uploaded the new refimages and the remaining failure is unrelated to this pr so I'm merging this.