feat: 返回编译事件，方便跟其他工具集成

[yesmeck]

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[codecov]

Codecov Report

Merging #784 into master will decrease coverage by 0.05%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master     #784      +/-   ##
==========================================
- Coverage   95.83%   95.78%   -0.06%     
==========================================
  Files         315      315              
  Lines        3575     3580       +5     
  Branches      544      544              
==========================================
+ Hits         3426     3429       +3     
- Misses        149      151       +2     

Impacted Files	Coverage Δ
packages/remax-cli/src/build/index.ts	33.33% <50.00%> (+4.16%)	⬆️
packages/remax-cli/src/build/watcher/index.ts	53.01% <50.00%> (-0.08%)	⬇️

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