Enable native Sunshine widescreen on tvOS

[joeblack2k]

Summary

• default the tvOS runtime to the bundled GMSE01 widescreen Gecko correction
• keep Dolphin’s generic widescreen stretch hack disabled
• lock the tvOS contract to the game-specific 16:9 path

The bundled Dolphin GMSE01 code adjusts camera and HUD coordinates; this is true game-side 16:9 rather than anamorphic stretching.

Tests

• python3 tests/test_tvos_contract.py
• ./tests/test-widescreen-heatwave-fix.sh
• git diff --check

[joeblack2k]

Physical Woonkamer validation (Apple TV 4K 2nd gen, tvOS 26.6): the GMSE01 intro rendered at 3840x2160. Runtime evidence: aspect mode=widescreen-16:9 gmse01WidescreenCode=1 genericWidescreenHack=0 heatwaveSuppressed=1. Screenshot: /tmp/sunpad-woonkamer-physical-runtime.png on the validation Mac.

[chrissotraidis]

Thank you, Jeroen — this is meaningful and is now incorporated in merged PR #42 and the published Preview 12 release. The native GMSE01 16:9 default, tests, and your physical Apple TV rendering evidence were retained. Your accepted commits are attributed to your GitHub account, and the README/release notes credit this contribution. I’m closing this source PR because the reviewed integration is now on main.