hotfix: add icon style when config themePackage

[ClarkXia]

需要为 icon 文件注入默认的 css-prefix

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: +51.33 🎉

Comparison is base (2368a5b) 30.60% compared to head (3f83152) 81.94%.

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #6019       +/-   ##
===========================================
+ Coverage   30.60%   81.94%   +51.33%     
===========================================
  Files         204      197        -7     
  Lines        5495    18104    +12609     
  Branches     1353     2356     +1003     
===========================================
+ Hits         1682    14836    +13154     
+ Misses       3510     3233      -277     
+ Partials      303       35      -268     

Impacted Files	Coverage Δ
packages/plugin-auth/src/index.ts	100.00% <0.00%> (ø)
packages/plugin-fusion/src/vitePluginTheme.ts
...ckages/build-app-helpers/src/getRoutesByAppJson.ts
...ges/webpack-plugin-extract-css-assets/src/index.ts
packages/plugin-stark-module/src/hbsHelpler.ts
packages/plugin-react-app/src/setDev.js
packages/plugin-service/src/_ice.ts
packages/plugin-auth/src/runtime.tsx
...kages/build-mpa-config/src/redirectRunAppLoader.ts
packages/plugin-icestark/src/lifecyclePlugin.ts
... and 387 more

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