sharkdp/hexyl ? reverse-engineered prompt

Build me a terminal hex viewer called hexyl.

I want a fast command line tool that opens a file and shows its bytes in a clean, colorized hex view, with the offset on the left, the hex bytes in the middle, and an ASCII preview on the right. Make the colors help spot null bytes, printable ASCII, whitespace, other ASCII, and non ASCII bytes at a glance. It should feel polished in the terminal and work well on modern Unix style systems, with Windows support if possible.

Let me configure the colors with environment variables, so I can change the look without editing code. Also include a simple way to install or build it from source, plus a basic README with usage examples and a small set of tests so I can trust it works. If you need to check current Rust or terminal behavior details, look up the latest docs online.