fix: windows path separator with git

[scolladon]

Explain your changes

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Normalized path used with to git commands
Ensure path is formatted according to git expectation (unix style)

Does this close any currently open issues?

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closes #434

• Jest test added to check the fix is applied.

Any particular element that can be tested locally

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Use windows architecture

[codecov]

Codecov Report

Base: 100.00% // Head: 100.00% // No change to project coverage 👍

Coverage data is based on head (42d996e) compared to base (037c394).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #436   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           31        31           
  Lines          806       810    +4     
=========================================
+ Hits           806       810    +4     

Impacted Files	Coverage Δ
src/utils/fileGitDiff.js	100.00% <100.00%> (ø)
src/utils/fsHelper.js	100.00% <100.00%> (ø)
src/utils/repoGitDiff.js	100.00% <100.00%> (ø)

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[codeclimate]

Code Climate has analyzed commit 42d996e and detected 0 issues on this pull request.

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