[wip] gop go -multi-files: option generate multi files

[visualfc]

• gop go -multi-files genarate multi files

main.gop => gop_autogen_main.go
Rect.gop => gop_autogen_Rect.go

• gop clean check gop_autogen_ prefix file

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.34%. Comparing base (cd02745) to head (5a0f849).
Report is 14 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2005      +/-   ##
==========================================
+ Coverage   93.32%   93.34%   +0.01%     
==========================================
  Files          42       42              
  Lines       11708    11742      +34     
==========================================
+ Hits        10927    10961      +34     
  Misses        624      624              
  Partials      157      157              

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