feat: support panelRef

[zombieJ]

添加 panelRef 以供 antd Modal 可以获取弹出窗口的 ref。

[vercel]

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Name	Status	Preview	Updated (UTC)
dialog	❌ Failed (Inspect)		Aug 7, 2023 2:15pm

[codecov]

Codecov Report

Merging #363 (1a39d8a) into master (76f3e5d) will increase coverage by 0.01%.
The diff coverage is 100.00%.

❗ Current head 1a39d8a differs from pull request most recent head eb51c83. Consider uploading reports for the commit eb51c83 to get more accurate results

@@            Coverage Diff             @@
##           master     #363      +/-   ##
==========================================
+ Coverage   99.37%   99.39%   +0.01%     
==========================================
  Files           7        8       +1     
  Lines         160      165       +5     
  Branches       50       50              
==========================================
+ Hits          159      164       +5     
  Misses          1        1              

Files Changed	Coverage Δ
src/Dialog/Content/Panel.tsx	100.00% <100.00%> (ø)
src/DialogWrap.tsx	100.00% <100.00%> (ø)
src/context.ts	100.00% <100.00%> (ø)

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