Add onAppear and onDisappear support

[Kyle-Ye]

Close #89

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 74 lines in your changes are missing coverage. Please review.

Project coverage is 13.92%. Comparing base (ff8fa94) to head (d906b6b).
Report is 1 commits behind head on main.

Files	Patch %	Lines
...iftUI/View/Modifier/AppearanceActionModifier.swift	0.00%	57 Missing ⚠️
Sources/OpenSwiftUI/Core/Update/Update.swift	0.00%	15 Missing ⚠️
...ources/OpenSwiftUI/Core/View/View/ViewInputs.swift	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #92      +/-   ##
==========================================
- Coverage   14.12%   13.92%   -0.21%     
==========================================
  Files         199      200       +1     
  Lines        4884     4955      +71     
==========================================
  Hits          690      690              
- Misses       4194     4265      +71     

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