New port: sysutils/pass-otp: Pass extension for managing one-time-password (OTP) tokens

A pass extension for managing one-time-password (OTP) tokens.

Features:

• managing and generating OTP tokens
• inserting new OTP key URI
• validating OTP URI
• appending OTP URI to existing password files

WWW: https://github.com/tadfisher/pass-otp

PR: 236126
Submitted by: alex@xanderio.de (previous version)
Reviewed by: krion
Approved by: krion (mentor)
Differential Revision: https://reviews.freebsd.org/D19434