A proper prompt

• Go (powerline/bullettrain-like) https://github.com/jtyr/gbt
• Go (powerline-like): https://github.com/bullettrain-sh/bullettrain-go-core
• Rust: https://github.com/starship/starship (git not async: https://github.com/starship/starship/issues/301)

Specification:

• must be fast (pure zsh themes are just too slow)
• git should be async like with agkozak/agkozak-zsh-prompt.
• display the current kubernetes user & context & cluster
• display if I’m in a Go module or GOPATH