sysutils/py-keep: new port

keep is a Meta CLI Toolkit that provides a personal shell command
keeper with some useful features:

* Save a new command with a brief description
* Search the saved commands using powerful patterns
* Save the commands as a secret GitHub gist
* Use keep push and keep pull to sync the commands between GitHub
  gist and other computers.

WWW: https://github.com/OrkoHunter/keep

PR:	265933