Pretty, minimal and fast ZSH prompt; nix and jj ified

Commits on main

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Sindre Sorhus committed
Sindre Sorhus committed
Sindre Sorhus committed
Sindre Sorhus committed
Sindre Sorhus committed
Sindre Sorhus committed
Sindre Sorhus committed
Sindre Sorhus committed
Sindre Sorhus committed