ZSH Theme Rework

[cjhveal]

would love to have async jobs. integration with n for node version (get node engine from package.json?)

Inspiration:

• zsh-megaprompt
• hackersaurus
• zshcomrade
• zero.zsh
• spaceship
• seeker
• oh-my-zsh-node
• odin
• liquidprompt
• judgedim
• dracula

[cjhveal]

https://github.com/sindresorhus/pure

uses zsh-async and terminal control codes to update prompt. Only marks git dirty, though.

A fork with more git support: https://github.com/therealklanni/purity/blob/master/purity.zsh

Would ideally like something like: https://github.com/olivierverdier/zsh-git-prompt