Port core SDL2 code to SDL3 - Input handling, window management, and rendering#245

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Copilot wants to merge 3 commits intolauncherfrom

copilot/fix-84486724-ad73-4436-a693-cae4320a57ab

Commits on Aug 5, 2025

Initial plan
Copilot
committed
Significant progress on SDL2 to SDL3 migration - core input/event system updated

Copilot
and
inigomonyota
committed
Complete core SDL3 migration - window management, input handling, and rendering API updates

Copilot
and
inigomonyota
committed