Powerlevel9k/powerlevel9k ? reverse-engineered prompt

Build me a beautiful ZSH prompt theme that works in a normal terminal and also with common ZSH setups like Oh My Zsh and Prezto. I want it to look polished out of the box, use Powerline style separators and icons, and show useful info like current folder, git status, exit status, time, user and host, plus optional bits like battery, memory, load, Python, Node, Ruby, Rust, Java, AWS profile, and virtualenv when they are available.

Make it easy to customize which pieces appear on the left and right side of the prompt, and keep it fast so the shell still feels snappy. Please include clear install and setup instructions, sensible defaults, and a way to tweak colors and icons without digging through a lot of code. If anything depends on current shell docs or font setup, look that up online if you need to.