Add Chrome/Firefox support via Chrome DevTools Protocol

[bitcoingametheory]

The current implementation uses Safari's Apple Events bridge (osascript). This is macOS-only.

A parallel implementation using Chrome DevTools Protocol (CDP) would enable:

• Cross-platform support (macOS, Linux, Windows)
• Chrome and Firefox (via remote debugging)
• Same read/write/watch pattern, different transport

The osascript → CDP adapter should be a drop-in replacement. Same interface, different bridge.

[bitcoingametheory]

Minimum viable approach is Safari. Safari works. Chrome is a derivative. Apple is a forcing function. Cost of Windows with linux hassle factor exceeds the benefit of non Safari approaches until another developer forks and finds Chrome, WSL, etc worth while. Until then just use Safari and mac unix.