Add support for pathspecs

[phil-blain]

I just discovered and installed this project and it's really great. I've been looking for a CLI tool to do line-by-line staging for a long time.

I think it would be even more great if git crecord would support pathspecs arguments, just as git commit, git add, git restore, git checkout, git reset and git stash push do.

So if i know that I just want to selectively stage lines in file foo, but file bar is also modified, I could do

git crecord foo

[andrewshadura]

Thanks for the idea, I will consider it when I work on this project next time!