Enhanced pie chart functionality (custom sector corner spacing)

[qingshan007]

Visualization Object ->Pie Chart:

1. Support custom sector spacing
2. Support custom sector fillet radius
3. Delete "Total:" as it occupies unnecessary space

Do any friends need these functions?

Example image:

[qingshan007]

Hello Superset Community:
I have some questions and need everyone's help to discuss them.

There is also a chart:
I don't know if I need to create a new chart type to build or continue configuring using a pie chart

Question:
The pie chart configuration will become more complex because the increase in configuration items is not conducive to users intuitively building the desired chart style