WIP: Generic flashcart support#61

Draft

NewLunarFire wants to merge 5 commits intomidoshouse:mainfrom

NewLunarFire:summercart64

Commits on Mar 16, 2026

Skeleton for SC64 support
Tommy Savaria
committed
Flashcart connection state management
Tommy Savaria
committed

Commits on Mar 17, 2026

Implemented handshake
Tommy Savaria
committed

Commits on Mar 18, 2026

Add receive frontend messages
Tommy Savaria
committed

Commits on Mar 19, 2026

Send files and progressive items work
Tommy Savaria
committed