feat(pie): add padAngle option

[linghaoSu]

Brief Information

This pull request is in the type of:

• bug fixing
• new feature
• others

What does this PR do?

Add padAngle option for PieSeries

Fixed issues

• resolve [Feature] 饼图各部分之间提供间隙支持 #19066

Details

After: How does it behave after the fixing?

Add the padAngle property to add spacing between sectors.

live demo

Document Info

One of the following should be checked.

• This PR doesn't relate to document changes
• The document should be updated later
• The document changes have been made in apache/echarts-doc#358

Misc

ZRender Changes

• This PR depends on ZRender changes (ecomfe/zrender#xxx).

Related test cases or examples to use the new APIs

N.A.

Others

Merging options

• Please squash the commits into a single one when merging.

Other information

[echarts-bot]

Thanks for your contribution!
The community will review it ASAP. In the meanwhile, please checkout the coding standard and Wiki about How to make a pull request.

The pull request is marked to be PR: author is committer because you are a committer of this project.

Document changes are required in this PR. Please also make a PR to apache/echarts-doc for document changes and update the issue id in the PR description. When the doc PR is merged, the maintainers will remove the PR: awaiting doc label.

[github-actions]

The changes brought by this PR can be previewed at: https://echarts.apache.org/examples/editor?version=PR-19076@4ce776c

[Ovilia]

This is a great feature to have! Thanks for your contribution!

[echarts-bot]

Congratulations! Your PR has been merged. Thanks for your contribution! 👍