Added copyrights

[hmanikkothu]

Description
Added copyrights to the following files:
/build/.goreleaser.yml
/docs/book/install-and-build.sh
/docs/book/litgo.sh
/docs/book/markerdocs.sh
/cmd/util/validations.go
/pkg/model/types.go
/pkg/scaffold/scaffold_suite_test.go
/pkg/scaffold/scaffold_test.go
/pkg/scaffold/input/input_suite_test.go
/pkg/scaffold/input/input_test.go
/pkg/scaffold/project/project_suite_test.go
/pkg/scaffold/project/project_test.go
/pkg/scaffold/resource/resource_suite_test.go
/pkg/scaffold/resource/resource_test.go
/pkg/scaffold/v1/crd/suite_test.go
/pkg/scaffold/v1/manager/manager_suite_test.go
/pkg/scaffold/v1/manager/manager_test.go
/pkg/scaffold/v1/webhook/webhook_suite_test.go
/pkg/scaffold/v1/webhook/webhook_test.go
/pkg/scaffold/v2/prometheus/monitor.go
/scripts/generate_dep_manifest.sh
/scripts/install.sh
/test/kind-config.yaml

Motivation
Fixes #1281

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[k8s-ci-robot]

Hi @hmanikkothu. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[Adirio]

You handled all the files I mentioned in #1281. The only doubt I have is if they should be 2020 copyrights or each file should have a copyright of the year it was created.

Otherwise, LGTM.

[Adirio]

Minor nit: I completely agree with this blank line, I actually authored #1187, but I would not change it in this PR as it is not related to the same topic.

[hmanikkothu]

Ok, will revert this.

[DirectXMan12]

2020 copyrights are fine

/approve
/lgtm

(P.S. for future reference, minor formatting changes in a PR are generally fine. I often prefer to put them in a separate commit, but something like "there should really be a blank line here" are fine to do as you notice them ;-) )

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: DirectXMan12, hmanikkothu

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