fix(git): handle worktrees while retrieving the path of repository

[orhun]

Description

Now we take worktrees into account while retrieving the path of the repositories.

Motivation and Context

Closes #1052

How Has This Been Tested?

Locally.

Types of Changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (no code change)
• Refactor (refactoring production code)
• Other

Checklist:

• My code follows the code style of this project.
• I have updated the documentation accordingly.
• I have formatted the code with rustfmt.
• I checked the lints with clippy.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 41.85%. Comparing base (372af4b) to head (ea6f995).
⚠️ Report is 200 commits behind head on main.

Files with missing lines	Patch %	Lines
git-cliff-core/src/repo.rs	0.00%	6 Missing ⚠️
git-cliff/src/lib.rs	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1054      +/-   ##
==========================================
- Coverage   41.94%   41.85%   -0.09%     
==========================================
  Files          21       21              
  Lines        1786     1790       +4     
==========================================
  Hits          749      749              
- Misses       1037     1041       +4     

Flag	Coverage Δ
unit-tests	41.85% <0.00%> (-0.09%)	⬇️

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