feat: add cli doc for backwards compatibly and warnings #415

Job	Run time
unit-tests (k8s-1.35.0)	2m 52s
deployment-policy (k8s-1.35.0)	8m 20s
cli-e2e (k8s-1.35.0)	6m 4s
e2e (k8s-1.35.0)	27m 49s
e2e (k8s-1.33.7)	23m 30s
e2e (k8s-1.31.14)	23m 41s
e2e (k8s-1.32.11)	25m 4s
e2e (k8s-1.34.3)	26m 18s
upload-coverage	19s
compute-metadata	6s
build-operator (linux/amd64, ubuntu-latest)	1m 48s
build-operator (linux/arm64, ubuntu-24.04-arm)	1m 46s
create-manifest	25s
	2h 28m 2s

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