Implemented script to insert and verify license in source header. Moved workflows implementation to scripts #33

Job	Run time
test-sources-license / test-sources-license	4s
build-php-deps / build-php-dependencies	1m 54s
build-native / setup-build-matrix / setup-build-matrix	1s
build-native / build-agent-library (linux-x86-64, amd64, deb rpm)	5m 46s
build-native / build-agent-library (linuxmusl-x86-64, amd64, apk)	5m 36s
ci	1s
tests-phpt / setup-build-matrix / setup-build-matrix	1s
build-packages / setup-build-matrix / setup-build-matrix	1s
tests-phpt / test-phpt (linux-x86-64, amd64, deb rpm)	51s
tests-phpt / test-phpt (linuxmusl-x86-64, amd64, apk)	29s
build-packages / build-packages (linux-x86-64, amd64, deb rpm)	25s
build-packages / build-packages (linuxmusl-x86-64, amd64, apk)	24s
	15m 33s

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