feat: 支持对 geometry 下的 elements zIndex 进行降序

[visiky]

Checklist

• npm test passes
• tests and/or benchmarks are included
• commit message follows commit guidelines

Description of change

• feat: geometry 增加 sortZIndex 配置项，允许配置 geometry 下的 elements 的展示(zIndex)排序规则
  

[visiky]

@hustcc @zqlu 你们看下这个配置项合理不，这是当前看到的最方便支持的方法。

但是存在一些 bug，比如交互 reset 后，zIndex 就丢失了，被激活又失去激活态的 element shape 会重置到最底层

[github-actions]

😭 Deploy PR Preview fadcdbd failed. Build logs

_{🤖 By surge-preview}

[coveralls]

Pull Request Test Coverage Report for Build 463654333

Warning: This coverage report may be inaccurate.

We've detected an issue with your CI configuration that might affect the accuracy of this pull request's coverage report.
To ensure accuracy in future PRs, please see these guidelines.
A quick fix for this PR: rebase it; your next report should be accurate.

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• 15 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.06%) to 93.498%

---

Files with Coverage Reduction	New Missed Lines	%
src/geometry/base.ts	15	94.73%

Totals
Change from base Build 463413836:	0.06%
Covered Lines:	10709
Relevant Lines:	11107

---

💛 - Coveralls