Add Guiding Principles #418

Job	Run time
build-and-verify (ubuntu-latest, 2.5, 8)	2m 29s
build-and-verify (ubuntu-latest, 2.5, 11)	2m 12s
build-and-verify (ubuntu-latest, 3.0, 8)	2m 19s
build-and-verify (ubuntu-latest, 3.0, 11)	2m 8s
build-and-verify (ubuntu-latest, 3.0, 17)	2m 16s
build-and-verify (ubuntu-latest, 3.0, 21)	2m 26s
build-and-verify (ubuntu-latest, 4.0, 8)	2m 16s
build-and-verify (ubuntu-latest, 4.0, 11)	2m 3s
build-and-verify (ubuntu-latest, 4.0, 17)	2m 20s
build-and-verify (ubuntu-latest, 4.0, 21)	2m 1s
build-and-verify (windows-latest, 2.5, 8)	3m 18s
build-and-verify (windows-latest, 3.0, 8)	3m 36s
build-and-verify (windows-latest, 4.0, 8)	3m 47s
build-and-verify (macos-latest, 2.5, 8)	5m 25s
build-and-verify (macos-latest, 3.0, 8)	3m 13s
build-and-verify (macos-latest, 4.0, 8)	3m 44s
	45m 33s

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