feat: add .clang-format spec #606

Job	Run time
Build on Windows (windows-2019, Visual Studio 16 2019, 11.5.1, 86, 3.11, RTX-3000-and-4000)	21m 7s
Build on linux systems (ubuntu-22.04, 11.7, 86, 3.11)	10m 6s
Build on Windows (windows-2019, Visual Studio 16 2019, 11.5.1, 75, 3.10, RTX-2000)	21m 26s
Build on linux systems (ubuntu-22.04, 11.7, 75, 3.10)	9m 46s
Build on Windows (windows-2019, Visual Studio 16 2019, 11.5.1, 70, 3.9)	16m 12s
Build on linux systems (ubuntu-22.04, 11.7, 70, 3.9)	10m 2s
Build on Windows (windows-2019, Visual Studio 16 2019, 11.5.1, 61, 3.8, GTX-1000)	14m 38s
Build on linux systems (ubuntu-22.04, 11.7, 61, 3.8)	7m 58s
Build on Windows (windows-2019, Visual Studio 16 2019, 11.5.1, 53, 3.7, -DNGP_BUILD_WITH_GUI=OFF ...	17m 20s
Build on linux systems (ubuntu-22.04, 11.7, 53, 3.7)	9m 50s
Build on Windows (windows-2019, Visual Studio 16 2019, 11.5.1, 37, 3.7)	16m 24s
Build on linux systems (ubuntu-22.04, 11.7, 37, 3.7, -DNGP_BUILD_WITH_GUI=OFF -DNGP_BUILD_WITH_VU...	7m 20s
Update continuous development release	58s
	2h 43m 7s

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