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Add clang-format configuration #669

Job	Run time
ubuntu (22.04)	19m 16s
oldschool (rockylinux, 9, debug)	4m 55s
oldschool (rockylinux, 9, release)	4m 42s
macOS (latest, 3.9, 5.9.*, release)	23m 3s
macOS (latest, 3.11, 5.12.*, debug)	15m 35s
macOS (latest, 3.9, 5.9.*, debug)	15m 19s
windows (win64_mingw73, 3.10, 5.12.*, x64)	6m 47s
windows (win64_msvc2019_64, 3.13, x64, 5.15.*, PythonQtCore PythonQtGui PythonQtMultimedia)	4m 2s
windows (win32_mingw53, 3.6, x86, 5.11.*)	6m 42s
windows (win64_msvc2017_64, 3.6, x64, 5.11.*)	5m 3s
ubuntu (24.04)	18m 59s
	2h 4m 23s

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