feat: support workflow event binding

[LinuxSuRen]

No description provided.

[codecov-commenter]

Codecov Report

Merging #6 (5307aa0) into master (ac01b6b) will increase coverage by 2.45%.
The diff coverage is 98.46%.

@@            Coverage Diff             @@
##           master       #6      +/-   ##
==========================================
+ Coverage   94.18%   96.64%   +2.45%     
==========================================
  Files           3        4       +1     
  Lines          86      149      +63     
==========================================
+ Hits           81      144      +63     
- Misses          2        3       +1     
+ Partials        3        2       -1     

Flag	Coverage Δ
unittests	96.64% <98.46%> (+2.45%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/argo-workflow.go	97.43% <97.91%> (+3.68%)	⬆️
pkg/github.go	100.00% <100.00%> (ø)

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