[FR] Support Windows paths in gopass show

[bharatvaj]

Summary

An input such as web\google.com does not match web/google.com and asks
the user for choice after searching it fuzzily.

Expected Behaviour

When the path is passed as web\google.com to gopass show, it should convert
all the backward slashes to forward slash and show the correct password.

Environment

Window cmd

Additonal Context

I'm writing a cmd script which enables the user to select a credential using a
fuzzy finder of the user's choice. There is no easy way to get forward slash
paths in cmd batch script and converting the selected path to forward slash format
is not straightforward.

It would be ideal to have an option like --path in gopass show as the script I'm
writing (and other fuzzy front-ends I presume) require traversing the "*.gpg" folder
tree anyway. Doing a complete directory traversal again after running gopass show
could be avoided with --path option that accepts backward slash(\) paths.

[dominikschulz]

@bharatvaj That sounds like a reasonable idea.

[bharatvaj]

Mind if I work on it and raise a PR?

[dominikschulz]

@bharatvaj Absolutely not. Go ahead if you like.