feat: modular workflow rules

mentioned in commit e4b58304

mentioned in merge request to-be-continuous/samples/freepascal-make-helm!53

mentioned in merge request to-be-continuous/samples/golang-cnb-helm-on-kubernetes!80

mentioned in merge request to-be-continuous/samples/golang-cnb-on-kubernetes!78

mentioned in merge request to-be-continuous/samples/maven-on-openshift!99

mentioned in merge request to-be-continuous/samples/golang-docker-on-aws!129

mentioned in merge request to-be-continuous/samples/maven-on-gcloud!154 (merged)

mentioned in merge request to-be-continuous/samples/maven-on-kubernetes!155