cli: add gopy command

[cpunion]

gop init/run/build/install

[codecov]

Codecov Report

Attention: Patch coverage is 16.02374% with 1132 lines in your changes missing coverage. Please review.

Project coverage is 54.11%. Comparing base (6d20a5c) to head (989ce2f).
Report is 38 commits behind head on main.

Files with missing lines	Patch %	Lines
cmd/internal/install/archive.go	1.55%	252 Missing and 2 partials ⚠️
cmd/internal/install/python.go	34.81%	198 Missing and 8 partials ⚠️
cmd/internal/rungo/run.go	0.00%	172 Missing ⚠️
cmd/init.go	0.00%	75 Missing ⚠️
internal/env/env.go	31.06%	70 Missing and 1 partial ⚠️
cmd/internal/install/deps.go	0.00%	49 Missing ⚠️
internal/env/pyenv.go	0.00%	48 Missing ⚠️
cmd/internal/create/create.go	57.44%	27 Missing and 13 partials ⚠️
cmd/internal/install/tiny_pkg_config.go	0.00%	39 Missing ⚠️
cmd/internal/install/golang.go	0.00%	34 Missing ⚠️
... and 12 more

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #28       +/-   ##
===========================================
- Coverage   90.50%   54.11%   -36.40%     
===========================================
  Files          19       40       +21     
  Lines        1422     2761     +1339     
===========================================
+ Hits         1287     1494      +207     
- Misses        102     1208     +1106     
- Partials       33       59       +26     

Flag	Coverage Δ
unittests	54.11% <16.02%> (-36.40%)	⬇️

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