Update Ghostty integration to latest libghostty-vt API #533

Job	Run time
Native Build (Linux) (arm64, ubuntu-24.04-arm, aarch64-linux-gnu)	54s
Native Build (Windows arm64)	58s
Native Build (Linux) (x64, ubuntu-latest, x86_64-linux-gnu)	44s
Native Build (macOS) (x64)	40s
Native Build (macOS) (arm64)	48s
Native Build (Windows x64)	1m 18s
Build & Test (ubuntu-latest)	5m 3s
Build & Test (macos-latest)	5m 12s
Build & Test (windows-latest)	5m 9s
Integration Tests (macOS)	1s
Pack NuGet	1s
	20m 48s

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