Add pdd - A tiny date, time diff calculator

[jarun]

Description

pdd (Python3 Date Diff) is a small cmdline utility to calculate date and time difference.

Features

• calculate date difference
• calculate time difference
• calculate diff from today and now
• add, subtract duration (timeslice) to/from date (time)
• show current date, time and timezone
• minimal dependencies

Checklist for submitting a pull request to Terminals Are Sexy:

• [x] I have carefully read and comply with the Contributing Guidelines of this repo.
• [x] I have searched the PRs of this repo and believe that this is not a duplicate.

- **Title**: pdd - **Link**: https://github.com/jarun/pdd - **Category**: Tools and Plugins - **Description**: A tiny date, time diff calculator