Set scatter chart marker size using coordinates

[hcrocker-ansys]

I'd like to set the marker size in scatter charts using coordinates.

My suggestion to implement this would be to add x0, x1, y0, and y1 attributes for scatter chart points, if these attributes are set the marker would scale to fit inside those coordinates. When setting the size using coordinates, the existing marker size attribute could be used as a minimum size.

The purpose of this is to be able to have points which represent a range of data instead of just a singular coordinate. A range of values across only one axis should also be supported.

The existing layout shapes aren't fit for our purpose because they can't be interacted with, and are quite slow for large datasets.

Here is an example of the type of data I would like to present (made using the existing shapes)

There have been related requests for absolute marker sizes already #3682
And similar requests in plotly.py plotly/plotly.py#3535

[gvwilson]

Thanks for the feature request @hcrocker-ansys - I'll add it to our backlog, though I'm afraid it will be months at least before we can get to it. If anyone would like to submit a PR, I can prioritize review - thanks.

[alexcjohnson]

Also #4838