fix(alert): fix style error width exceeds the parent element

[gavin-hao]

…sizing:border-box
当 alert宽度100% ，因为存在padding,alert宽度会超出外层元素的宽度， gio-alert 设置样式 box-sizing:border-box;

@gio-design/package@version

• Alert

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@gio-design/package@version

• Alert

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[codecov]

Codecov Report

Merging #633 (51daa5b) into master (2d4254b) will decrease coverage by 0.13%.
The diff coverage is 60.00%.

@@            Coverage Diff             @@
##           master     #633      +/-   ##
==========================================
- Coverage   82.65%   82.51%   -0.14%     
==========================================
  Files         130      130              
  Lines        4371     4382      +11     
  Branches     1153     1160       +7     
==========================================
+ Hits         3613     3616       +3     
- Misses        754      762       +8     
  Partials        4        4              

Impacted Files	Coverage Δ
...ckages/components/src/components/select/Select.tsx	91.36% <54.54%> (-3.40%)	⬇️
packages/components/src/components/list/list.tsx	92.85% <100.00%> (+0.07%)	⬆️

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