Add purpleteam CLI

[binarymist]

Checklist for submitting a pull request to Terminals Are Sexy:

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

• Title: purpleteam
• Link: https://gitlab.com/purpleteam-labs/purpleteam
• Category: Tools and Plugins
• Description: Front-end to the security regression testing SaaS purpleteam"

[binarymist]

As per #183

[nzquail]

I've seen this tool demonstrated. Makes security regression testing your web apps and APIs painless, the set-up is trivial, and including in your nightly build is done by simply running the command purpleteam test. Can't wait for this to be finished so we can consume in our devsecops pipeline.

[binarymist]

New website: https://purpleteam-labs.com/ @k4m4