[Feature Request] Support for Partial Completions - e.g. File/Directory Paths

[mattoculus]

Feature Request

Hello! Thanks so much for forking and maintaining this package. I'm looking at building a shell that simulates a local directory structure, so that a user would be able to "cd /etc/passwd" etc. their way around.

I noticed completer/file.go exists, but from testing it only seems to complete files/directories in the immediate directory.

I think this would need to be supported by having each prompt.Suggest be able to indicate its a partial completion, so when once it's completed it would re-suggest the next path down. So a few questions, if you don't mind:

1. Is this possible now and I've just missed something?
2. If not, is this something this package maintainers would be willing to support?
3. Are you able to give some pointers to the code on how to support his, i could look submitting a pull-request myself.

Thanks!