Add -b flag to init subcommand

[SandrineP]

Add -b flag to init subcommand
Remove usage of git in tests

[codecov]

Codecov Report

❌ Patch coverage is 95.45455% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 86.65%. Comparing base (372f1ef) to head (9cce149).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/subcommand/init_subcommand.cpp	93.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #119      +/-   ##
==========================================
- Coverage   87.69%   86.65%   -1.04%     
==========================================
  Files          60       60              
  Lines        2463     2481      +18     
  Branches      304      307       +3     
==========================================
- Hits         2160     2150      -10     
- Misses        303      331      +28     

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[ianthomas23]

This line is now that same here and in the else branch below, so it could be moved outside the end of the if-else.

[SandrineP]

It can't, because the repo doesn't exist outside of the if-else. I tried to change that using something like repository_wrapper repo = [this](){if-else}() but there was a problem with the init then.
I gave it anohter try and it seem to work.

[ianthomas23]

OK, let's merge. Thanks @SandrineP