git-url parsing

[Byron]

In the git-url crate, implement parsing of all URL types that git supports, as documented here: https://www.git-scm.com/docs/git-clone#_git_urls

The implementation should be practical, and does require tests for each case.

nom can be used, and if used, the parser should not support streaming.
Please feel free to add your author name into the crate list.

It's preferred to have a WIP PR and push all results into that one as I must reserve the right to pick up what's there in case development stalls to avoid blocking overall progress.

[bluejekyll]

I believe that the url crate will support all of the features necessary. Any reason you see as not using that?

[Byron]

Great point, I think it could do some of the parsing, and avoid common pitfalls around URLs. Some Git-URLs are shortened forms of URLs that probably won't parse unless they are cononicalized, which is probably why I thought about custom parsing.
Besides, I am quite avoidant to pulling in new crates to keep compile times at bay.

That said, I realize that this issue was created in a rush and doesn't match the quality standards I aim to uphold for this project, which is why I like to take a step back and close it in favor of getting #8 done first.

Thanks for your understanding