Switch get commands to use tables for output

.github/workflows/e2e.yaml

cmd/gotk/get.go

cmd/gotk/get_helmrelease.go

cmd/gotk/get_kustomization.go

cmd/gotk/get_source_bucket.go

cmd/gotk/get_source_git.go

cmd/gotk/get_source_helm.go

cmd/gotk/utils.go

docs/cmd/gotk_get.md

docs/cmd/gotk_get_helmreleases.md

docs/cmd/gotk_get_kustomizations.md

docs/cmd/gotk_get_sources.md

docs/cmd/gotk_get_sources_bucket.md

docs/cmd/gotk_get_sources_git.md

docs/cmd/gotk_get_sources_helm.md

go.mod

go.sum