Add μz - zsh micro plugin manager

[maxrodrigo]

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: μz

• Link: https://github.com/maxrodrigo/uz

• Category: zsh

• Description: zsh micro plugin manager.

Thanks ! 🙌 ❤