refactor!: libvcs.utils -> libvcs._internal

[tony]

• refactor!: libvcs.utils -> libvcs._internal

[codecov]

Codecov Report

Merging #345 (a03cfc9) into master (908dc98) will decrease coverage by 3.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #345      +/-   ##
==========================================
- Coverage   74.80%   71.75%   -3.06%     
==========================================
  Files          26       20       -6     
  Lines        1961     1650     -311     
==========================================
- Hits         1467     1184     -283     
+ Misses        494      466      -28     

Impacted Files	Coverage Δ
libvcs/cmd/git.py	53.34% <100.00%> (ø)
libvcs/cmd/hg.py	69.73% <100.00%> (ø)
libvcs/cmd/svn.py	52.23% <100.00%> (ø)
libvcs/projects/base.py	100.00% <100.00%> (ø)
tests/cmd/test_core.py	100.00% <100.00%> (ø)
tests/projects/test_conftest.py	100.00% <100.00%> (ø)
tests/projects/test_git.py	99.38% <100.00%> (ø)
tests/projects/test_hg.py	95.23% <100.00%> (ø)
tests/projects/test_svn.py	96.15% <100.00%> (ø)
libvcs/_internal/dataclasses.py
... and 5 more

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