feat: add hook scripts support

mentioned in commit 0491106c

mentioned in merge request to-be-continuous/samples/python-docker-compose!6 (merged)

mentioned in merge request to-be-continuous/samples/python-on-azure!48 (merged)

mentioned in merge request to-be-continuous/samples/python-helmfile-on-kubernetes!72 (merged)

mentioned in merge request to-be-continuous/samples/python-on-kubernetes!61 (merged)

mentioned in merge request to-be-continuous/samples/freepascal-make-helm!29 (merged)

mentioned in merge request to-be-continuous/samples/golang-cnb-helm-on-kubernetes!58 (merged)

mentioned in merge request to-be-continuous/samples/golang-cnb-on-kubernetes!60 (merged)

mentioned in merge request to-be-continuous/samples/maven-on-openshift!59 (merged)

mentioned in merge request to-be-continuous/samples/python-serverless-on-aws!145 (merged)

mentioned in merge request to-be-continuous/samples/golang-docker-on-aws!90 (merged)

mentioned in merge request to-be-continuous/samples/maven-on-gcloud!104 (merged)

mentioned in merge request to-be-continuous/samples/maven-on-kubernetes!112 (merged)