joypad-tester

Scaffold a new Joypad Tester console port to the repo's standard. Fire this for requests like "build Joypad Tester for <console>", "add a <console> port", "new joypad tester for <console>", or "port the joypad tester to <console>". Researches the console's controller-port protocol + homebrew toolchain, scaffolds the subdir to PORTING.md spec (mode scaffold, screensaver, options menu, About, CI + docs wiring), and emits a per-console device/parsing checklist for the human to fill in the console-specific reads. Guided scaffold — it does NOT blind-write protocol code it can't verify.