PabloxSec/PassGan ? reverse-engineered prompt

Build me this PassGan app as a fast password generation tool for security research.

I want a Rust based command line program with an interactive terminal menu when I run it with no arguments, and a normal scriptable CLI when I pass flags. It should let me train and generate passwords in a few different ways, one using a PyTorch GRU model through Python, one using a fast Markov chain generator in Rust, and one using a rule based pattern generator for realistic human style passwords.

Please make it able to save and load training checkpoints, generate password wordlists to a file, and support basic settings like length range, sample count, and randomness or temperature. If anything in the README is unclear, feel free to look up the current docs online and make sensible choices. Keep it polished, fast, and easy to use from the terminal.