Standardize project to KDAB copyright policy #161

Job	Run time
build (ubuntu-latest, ci-dev-client-only-qt5, 5.15)	3m 32s
build (ubuntu-latest, ci-dev-client-only-qt6, 6.5.*, qtshadertools qtscxml)	4m 42s
build (ubuntu-latest, ci-dev-client-and-ui-qt5, 5.15)	5m 53s
build (ubuntu-latest, ci-dev-client-and-ui-qt6, 6.5.*)	7m 52s
build (windows-latest, ci-dev-client-only-qt5, 5.15)	4m 40s
build (windows-latest, ci-dev-client-only-qt6, 6.5.*, qtshadertools qtscxml)	6m 2s
build (windows-latest, ci-dev-client-and-ui-qt5, 5.15)	7m 6s
build (windows-latest, ci-dev-client-and-ui-qt6, 6.5.*)	10m 40s
build (macos-latest, ci-dev-client-only-qt5, 5.15)	4m 26s
build (macos-latest, ci-dev-client-only-qt6, 6.5.*, qtshadertools qtscxml)	9m 42s
build (macos-latest, ci-dev-client-and-ui-qt5, 5.15)	9m 36s
build (macos-latest, ci-dev-client-and-ui-qt6, 6.5.*)	15m 15s
	1h 29m 26s

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