feat: add toolbarRender

[linxianxi]

提供给用户完全自定义的能力

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
image	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 7, 2023 3:52am

[codecov]

Codecov Report

Merging #241 (95843ab) into master (2b0f132) will decrease coverage by 1.13%.
The diff coverage is 91.66%.

❗ Current head 95843ab differs from pull request most recent head 5bc6a7d. Consider uploading reports for the commit 5bc6a7d to get more accurate results

@@            Coverage Diff             @@
##           master     #241      +/-   ##
==========================================
- Coverage   99.11%   97.98%   -1.13%     
==========================================
  Files           7        7              
  Lines         339      348       +9     
  Branches      102      108       +6     
==========================================
+ Hits          336      341       +5     
- Misses          3        6       +3     
- Partials        0        1       +1     

Impacted Files	Coverage Δ
src/Image.tsx	96.42% <ø> (ø)
src/Operations.tsx	92.59% <88.23%> (-7.41%)	⬇️
src/Preview.tsx	100.00% <100.00%> (ø)
src/PreviewGroup.tsx	100.00% <100.00%> (ø)
src/previewConfig.ts	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

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[afc163]

覆盖率掉了，看看？

[afc163]

This will close #153 too.

[linxianxi]

覆盖率掉了，看看？

覆盖率要怎么修复？

[afc163]

https://app.codecov.io/gh/react-component/image/pull/241?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=react-component#diff-c3JjL09wZXJhdGlvbnMudHN4

看下哪里没跑到，写个用例跑一下。