fix: decrease amount of git-related errors and warnings

[Zebradil]

• fix(init): do not discover git environment
• chore: go mod tidy
• refactor: move git functions out of Globe
• fix: handle no-git situation during init and in Smart Mode

Fixes #188

[codecov]

Codecov Report

Attention: 22 lines in your changes are missing coverage. Please review.

Comparison is base (f5cf765) 48.20% compared to head (6bfae8f) 48.55%.
Report is 1 commits behind head on dev.

Files	Patch %	Lines
internal/myks/globe.go	59.25%	5 Missing and 6 partials ⚠️
internal/myks/git.go	78.78%	7 Missing ⚠️
internal/myks/smart_mode.go	0.00%	3 Missing ⚠️
cmd/init.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #208      +/-   ##
==========================================
+ Coverage   48.20%   48.55%   +0.34%     
==========================================
  Files          30       30              
  Lines        2587     2587              
==========================================
+ Hits         1247     1256       +9     
+ Misses       1148     1145       -3     
+ Partials      192      186       -6     

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