feat: support GPG in cryptfs command line tool #8
Description
After v0.4.0 was released support for a GPG cryptor was included. We should support this in the command line tool as well.
Specify a command line flag to read the key from the filesystem and optional password file. We could read the password from stdin if required to decrypt the key.
Edit: Read keys from GPG keyring if none were provided on the CLI.