[FR] Add `skaffold inspect` command for adding config dependencies

For example:
`skaffold inspect config-dependencies add dependency.yaml -f skaffold.yaml`

where `dependency.yaml` contains list of [ConfigDependency](https://github.com/GoogleContainerTools/skaffold/blob/bca77a4f2d421f487adf20c6b34af0daba08c2f7/pkg/skaffold/schema/latest/config.go#L125) that would be added to the dependencies already defined in the `skaffold.yaml` or added as the only dependencies if the configs in the `skaffold.yaml` don't have dependencies. Would expect `--module` support to specify which configs to adjust. This is similar to the various `add` commands in `skaffold inspect build-env`.