Feature request: `goto --register-cwd`

[YoungCatChen]

Hi there!

I like this goto utility a lot. I use it everyday.

As I feel it very convenient, I'd like to propose a feature request that would make it rather more convenient. I found myself usually cd into a directory, use my mouse to select the directory name, copy it, then use goto -r <paste> . to register it. It will be great if goto accepts a new flag, --register-cwd or --register-current, with short cut at -R, to bookmark the current directory.

What do you think about this idea? I can propose a PR if you think this is a good direction. I'm open to all suggestions.

Thanks,
YoungCat