Inside Bar Text Automatically Rotates

[tim-sauchuk]

With a stacked bar chart, when a part of the stack becomes too small, inside positioned text automatically rotates 90 degrees. It would be useful to be able to control whether or not the text rotates.

[alexcjohnson]

good idea. Presumably a textangle attribute... that at least for outside text could be anything:

inside text might only support multiples of 90 degrees. Would default to 'auto' to use the current behavior.

[etpinard]

would be useful in upcoming funnel traces too (cc #3504)

[etpinard]

@archmoj no need to do this for 1.48.0, but if you find the time ... go for it 👌