add README #161

Job	Run time
check / include-orders	5s
check / doxygen	1m 2s
check / clang-checks	1m 35s
check / editor-config	9s
check / cppcheck / cppcheck-test	8s
build-os-matrix	1s
build (fedora:38) / build	1m 25s
build (oraclelinux:8) / build	1m 17s
build (oraclelinux:9) / build	1m 9s
build (rockylinux:9) / build	1m 1s
rpm-test (oraclelinux:9) / test	21s
rpm-test (fedora:38) / test	45s
make-test (fedora:38) / make-test	1m 56s
rpm-test (rockylinux:9) / test	12s
rpm-test (oraclelinux:8) / test	40s
make-test (oraclelinux:9) / make-test	1m 30s
make-test (oraclelinux:8) / make-test	1m 40s
make-test (rockylinux:9) / make-test	1m 26s
	16m 22s

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