vcs-registry: All vcspull compatible URLs must have URLs detected

[tony]

Required by vcs-python/vcspull#373

and i dont have time to do this until the weekend

Todo:

• copy over all possible URL combinations that can happen in .vcspull.yaml configurations
  • add them to a massive pytest.parametrize test grid
  • all of them must ✅ pass
  • To be very generous, even try to allow git+ssh://git@github.com:tony/pytest.git (mix of copying from github + a pip url)
• see how / if remotes should be resolved on libvcs (and if so, which module) or in vcspull

[codecov]

Codecov Report

Merging #420 (79d9b01) into master (1a14726) will increase coverage by 0.17%.
The diff coverage is 67.32%.

@@            Coverage Diff             @@
##           master     #420      +/-   ##
==========================================
+ Coverage   62.00%   62.17%   +0.17%     
==========================================
  Files          36       39       +3     
  Lines        2811     2911     +100     
  Branches      675      695      +20     
==========================================
+ Hits         1743     1810      +67     
- Misses        640      667      +27     
- Partials      428      434       +6     

Impacted Files	Coverage Δ
src/libvcs/_internal/module_loading.py	39.02% <39.02%> (ø)
src/libvcs/_internal/shortcuts.py	75.00% <57.14%> (-11.96%)	⬇️
tests/url/test_registry.py	95.45% <95.45%> (ø)
src/libvcs/url/registry.py	95.83% <95.83%> (ø)

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