Remove data races by avoiding global CLI logger

[aaronsky]

Refactor logging implementation to avoid problematic use of global logger.

[codecov-commenter]

Codecov Report

Merging #43 (87642a6) into main (8b746fa) will decrease coverage by 0.92%.
The diff coverage is 64.53%.

@@            Coverage Diff             @@
##             main      #43      +/-   ##
==========================================
- Coverage   81.79%   80.87%   -0.93%     
==========================================
  Files          36       38       +2     
  Lines        2324     2337      +13     
==========================================
- Hits         1901     1890      -11     
- Misses        326      345      +19     
- Partials       97      102       +5     

Impacted Files	Coverage Δ
internal/clicommand/completions.go	94.73% <ø> (ø)
internal/clicommand/release.go	68.25% <0.00%> (-0.73%)	⬇️
internal/client/assets.go	44.07% <0.00%> (-0.32%)	⬇️
internal/client/client.go	86.84% <ø> (ø)
internal/git/git.go	100.00% <ø> (ø)
internal/log/log.go	0.00% <0.00%> (ø)
internal/parallel/group.go	100.00% <ø> (ø)
internal/pipe/git/git.go	97.56% <ø> (-2.44%)	⬇️
internal/template/template.go	100.00% <ø> (ø)
internal/shell/shell.go	84.09% <53.33%> (-15.91%)	⬇️
... and 17 more

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