Make software tools Mac-like

[rhalkyard]

The declaration ROM programming tool will be one of the first things users see when they start using their SEthernet/30 (since boards will come from the manufacturer unprogrammed), and while the current console-based application does the job, it's pretty rough around the edges, and for some reason Retro68 console apps are absolutely enormous.

Rewrite it as a Mac-like GUI application, with a focus on ease of use for first-time users.