Willow7737/0.2-BTC-Puzzle-script ? reverse-engineered prompt

Build me a Python toolkit for exploring the 0.2 BTC puzzle from the image and testing possible seed words against the target Bitcoin address.

I want one script that can validate candidate words, estimate how long a search will take, check a specific phrase against the address, and run a full search with checkpoints so it can stop and resume safely. It should also include a small forensic helper that can inspect the puzzle image and recover any words that are visibly hidden in it, plus a few utilities for cropping and probing the image.

Make it easy to run from the command line with clear output, a self test mode, and a bench mode so I can see how fast it is on my machine. If a faster crypto library is available, use it, but the script should still work with just the standard library. Please keep the README style guidance in mind, and if you need current library details, look them up online.