docs: update copyright, maintainers, and code standards for boilerpla… #7599

Job	Run time
docs	23s
gomod	52s
image_tags	1s
lint	4m 5s
build (controller)	2m 40s
test (test)	11m 54s
reno_lint	41s
build (kanctl)	2m 30s
test (integration-test)	8m 31s
build (kando)	2m 22s
test (helm-test)	3m 28s
release	10m 54s
release_example_docker_images / build_cassandra / build_image	47s
release_example_docker_images / build_kafka-adobe-s3-source-connector / build_image	7m 14s
release_example_docker_images / build_es-sidecar / build_image	7m 54s
release_example_docker_images / build_kafka-adobe-s3-sink-connector / build_image	7m 16s
release_example_docker_images / build_mongodb / build_image	34s
release_example_docker_images / build_mysql_sidecar / build_image	4m 4s
release_example_docker_images / build_postgres-kanister-tools / build_image	5m 46s
release_example_docker_images / build_postgresql / build_image	5m 36s
release_example_docker_images / build_mssql-tools / build_image	33s
	1h 28m 5s

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