[WIP] add variable FPS & VSync #1102

Job	Run time
prepare-static-dependencies	20s
prepare	13s
build-macos (macos-26-arm)	1m 34s
build-macos (macos-26-arm-static-link)	2m 18s
build-windows (windows-x86-sse2)	3m 20s
build-macos (macos-15-intel)	4m 1s
build-windows (windows-2025)	4m 41s
build-windows (windows-x64-avx2)	3m 43s
build-linux (ubuntu-static-link)	2m 29s
build-linux (ubuntu-22)	2m 32s
build-linux (ubuntu-26)	2m 5s
build-linux (ubuntu-arm-static-link)	2m 54s
build-linux (ubuntu-24)	1m 51s
build-windows (windows-arm64)	3m 54s
build-windows (windows-x64-no-simd)	3m 53s
build-macos (macos-26-intel-cross-compile-static-link)	2m 7s
	41m 55s

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