Add SGal(3) #297

Job	Run time
build-win (windows-2019, Visual Studio 16 2019)	8m 39s
build-ubuntu (ubuntu-20.04, Release, gcc, g++)	4m 57s
build-win (windows-2022, Visual Studio 17 2022)	8m 44s
build-mac (macos-11)	4m 59s
build-ubuntu (ubuntu-20.04, Release, clang, clang++)	4m 34s
build-mac (macos-12)	4m 45s
build-ubuntu (ubuntu-20.04, Debug, gcc, g++)	6m 20s
build-ubuntu (ubuntu-20.04, Debug, clang, clang++)	3m 12s
build-ubuntu (ubuntu-22.04, Release, gcc, g++)	6m 4s
build-ubuntu (ubuntu-22.04, Release, clang, clang++)	4m 51s
build-ubuntu (ubuntu-22.04, Debug, gcc, g++)	5m 45s
build-ubuntu (ubuntu-22.04, Debug, clang, clang++)	3m 52s
valgrind	0s
cppcheck	0s
autodiff	0s
ceres	0s
codecov	0s
pybind11-cmake	0s
pybind11-pip	0s
	1h 6m 42s

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